If you have are going to Home Depot or Lowes, head over to their rental department (dunno if Lowes has one, haven't been near a Lowes for about 2 years now). See if they have routers to rent. Go that route if they have Porter Cable, DeWalt, or Milwaukee routers. This will allow you to test them (or do your cab) before you lay down cash for them. That'll also give you a feel for what SUCKS about a machine. If it sucks for that little bit of time, eventually you'll want to sell it.
In daily use, I've found the pistol-grip (d-handle?)type handle router easiest to handle.
Plunge routers, for cab building purposes, are ABSOLUTELY not necessary. As has been posted here, a fixed base slowly lowered to the workpiece will be adequate. The plunge router would be required to make clean holes (such as a drill) and as such, are simply not a requirement for our application.
If you can afford a kit with two (or more) handles, buy THAT ONE. You'll appreciate the different bases in the long run. They each have their use. The d-handle I use is great if you're freehanding around a piece. The short knob-type handles are hard to manage with only one hand.
As for router tables, for the size of pieces you'll probably have, most router tables are just not large enough to support 'em. You'll probably end up having to re-rout some edges cuz they didn't shape right, or worse yet, with a slot-cutting bit, you'll screw up a whole side.
I recommend Porter Cable, DeWalt, and Milwaukee. In that EXACT order. I know they're expensive. You WILL get what you pay for. Nicer adjusters, more accurate adjustments, easier bit changing, better dust removal, et al.
A word of warning. It sounds as if you've never used a router before. YOU should NEVER EVER use less than two hands until you've built up enough time that you feel comfortable and have the proper handle to go to one-handed operation. Even THEN, don't attempt any long (over 2') one-handed cuts until you've built up MORE time that you feel comfortable.
Lastly, don't EVER turn your machine on until you are POSITIVE you have tightened the bit-fastening mechanism. Nothing like having a bit spin around the room at a million rpm's after you THOUGHT you had it locked down!