You can get the T4 or Evader from tower - losi would be another story (already searching for a supplier and don't even have the truck yet...)
Tower is currently probably the best online supplier you're gonna find for availability and price.
For gp3300's you can get them from tower, but you will find better prices at
http://www.maxamps.com or
http://www.cheapbatterypacks.com -- some guys are gonna preach about .001 volt difference and matched this and that, but when I'm looking at the same battery here for $25 vs. the same battery there for $60, .001 volt isn't getting my money...
metal gear servo - doesn't matter which truck you get - get the metal gear servo.
There are a lot of great peak chargers for around $50 or so, which work just fine. Duratrax makes some nice ones, MRC 959's are in that price range and work well, etc.
And for mr. acexxx -- yes, you might as well jot this on your calendar - I recommended the T4. The evader has been a great truck, and for my purposes I love it. I will admit that it's not for everyone, though - always have.