Alvin, you might want to visit with local avionics shops to see what they recommend, unless you are confident you can overcome installation and maintenance/repairs on those installations. The actual unit brand/models are what you are probably inquiring about, but the installation of the radios are the key to long troublefree service. A poorly executed installation is the primary reason for avionics dissatisfaction.
Otherwise, most of the name-brand radios available thru catalog stores are pretty good these days (assuming you're buying new units.) I wouldn't recommend buying used units unless they've been reconditioned by their manufacturer, or you have a good relationship with a local avionics shop who can speak well for whichever used units you are considering.
Having said that...
I have been very happy with the Narco units in my airplane. They are a simple set-up: A single Narco 810 (760 ch. Com with Flip-Flop capability. It also has a simple memory feature which I rarely use, but some people like.) My transponder is a Narco AT-150A, which has an excellent service history, but Narco also has a newer model on the market now, the AT 165. I also have a Narco AR 850 blind encoder. None of these radios have ever given me any trouble. (I thought the Com had a problem and used the Narco factory repair service, but it turned out the problem was actually in my PM-1000 intercom. Narco gave me fast turnaround and a new warranty for my trouble even tho' it wasn't their fault.)
As I mentioned, I have a PM Engineering intercom. It's a good unit, despite a freak failure of an internal relay in cold weather. They repaired it for $25 plus shipping.
I also installed a Bendix/King KLN-88 Loran, and while it's a good unit to have in the U.S., I'd not recommend it for any other area of the globe than North America due to poor Loran coverage (and no database) elsewhere. But for the continental U.S., Alaska, Canada, and the Carribean, it's a good, capable unit. Also, unless you're handy with your own installations, it'll not be the inexpensive back-up navigation radio it proved to be for me.
The best investment I've made in recent history has been a GArmin 196 portable GPS. It comes standard with a mount which very neatly places it on the glareshield like a HUD (Heads-Up-Display). It required no other installation at all (if you don't mind operating on it's internal batteries, but I installed a dedicated power-cord permanently installed with a circuit breaker.) It's self-contained antenna has worked with excellent results in all flight conditions mounted in that location. (Otherwise you might want to use their suction-cup antenna or go with a permanent external antennna. But I've been happy with the built-in/on unit.) That unit has all the features I use most....simple navigation, with instrument approaches also for backup. I can snap it out and take it in the car or on the boat too, because it also has road and marine navigation capability. And it keeps my logbooks electronically which it'll transfer to my PC. (Garmin has more expensive, snazzier units with color and terrain if you want and can afford them. But the 196 is plenty good for aviaiton use. Garmin has recently added obstacles/towers to the 196 features, and the software for it is downloadable from their website.)
I've got an ELT (ACK EO-1) but it's obsolete with the new 406 units now out on the market. I'd recommend you shop around for that, if you're interested, but keep in mind that not all ELT's legal for use in the U.S. can be used abroad. (Even with the newer 406 units, not all of them are legal in some countries. Check with your authorities. The Artex ME406 unit is probably the least expensive unit that can be used over there....abut $1K.) ELT's are one of those things you hope you never need and may have a difficult time justifying....until you need it. You may not have a choice depending upon your regulatory authorities. At least the newer 406 units are more likely to bring a rescue team in a reasonable time-frame than the older units.)
For basic VFR (and even simple IFR) that's all I need. I do carry a hand-held portable as well. (Bendix/King KX-99 but newer units are now available.)
Here's a couple of links you might find useful. (Eastern Avionics has excellent avionics advice in their "Avionics Guidebook" ...click on that icon on their home page and follow the links.
http://avionix.com/ (Also, see their "Great Buys" advice. I'm not saying Eastern is really the place to buy....but their avionics advice is some of the best!)
Narco:
http://www.narco-avionics.com/