KCDW,
I have just bought a GPSIII pilot and can't fault it for what I want.
The reception is excellent on the internal aerial. (I have even had it on the passenger seat and just picked it up and glanced at it) It has a fairly accurate Jep Database (although it should not be 100% relied upon). It does give you controlled airspace warnings if you want them, but you can turn them off. The map is fine for checking position relative to your chart. The GOTO function is useful if you need to divert. Its extremely simple to use with very few button pushes required.
The only downside is its a bit more expensive than the units you have listed. If you're not too worried about the Jep Database then just update once a year. For the bit of extra cash you get an excellent middle of range GPS.
All in all, a great bit of kit.
Just my 2ps Worth.
FWyg