ajg - If you want but it's older technology and not really worth it, 3300's have absolutely sick runtime and can come with very impressive numbers. 2400's have nice punch for stock racing but it does drop off as the pack dumps(unlike 3300's). I doubt I would ever be able to finish a race if I tried using my 2400's for mod. My 2400's dump completely in around 6 to 6&1/2 minutes in stock, 3300's run till 8 to 10 minutes. Heck I might be pushing it using them for 19t.
Nicd's are very straight foward to keep in good condition and are adiquate for stock racing but 3300's have long runtimes that give you the option of being able to use them for mod later if you so please. 3300's arn't that hard to keep in decient condition it's just there are so many different ways that the upkeep seems more clouded then the nicd's. Most important is to always let your pack cool to room temp before you do anything to it.