Vex Vs. Edubot Vs. RCX Vs. NXT

[Leav]

After graduating from FIRST (temporarily, until I start my own team after the army!) I want to do robots on my own a bit.

I don't have an electronics lab yet, so I would be looking to start from a kit.

I used to own an RCX but someone <cough>Mom</cough> threw it out or gave it away or misplaced it.


so basically what i am asking is this:
what would you recommend I invest my money in:
Vex
Edubot
RCX
NXT

The edubot doesn't come with any robot parts i think and it a bit pricey compared to the VEX.
The RCX is discontinued so I would REALLY need a good reason to get one (a good deal is a good reason).

the real dilemma is the VEX versus the NXT.
could someone more knowledgeable maybe shed some light on the pros and cons of each.

Thanks!
-Leav

(p.s I will be programming in C anyway.)
(p.p.s I hope this is in the right forum...)