CM18 MOD 1
They're all about the same for performance and durability. You're asking the difference between a ram1500 SLT and ram1500 big horn; they're the exact same truck with some difference features.
If you want a super cheap and simple battery setup; get a 9.6v "nunchuk" nimh battery to use in your crane stock and a wall charger.
If you want the best setup; get a $60 "iMax B6AC" smart charger, and order some 7.4v 1200mah stick batteries from hobbyking.com, they'll be like $8 each and are high end batteries.
If you want to know the difference between NiMH and LiPo batteries, there's actually a thread on it in the noob section (battery information)