I personally would go for a e-revo BL edition. Cost effective package that has everything you will need... besides batteries.
Advantages of lipo?....dude..its writen on the rosetta stone
Little to NO maintenance
Instant torque ...aka you can do backflips...on the ground
insane acceleration off the line
speeds that you wont wanna hit
Dependent on ESC you can "tune" your car to your needs
Nitros suck...
At this point, the "official" E-Revo Brushless Edition from Traxxas (not a convert) will be released on January 16th, 2009. So at the point, the only pictures you can see are at Traxxas.com. I can't wait! My LHS will have one for me as soon as they are in stock! WooHoo!