I would take that deal xrays are pretty solid and the lipos sound like a good deal. Dont worry about what spec it is. If its the us spec(the carpet car) and you want to run on asphalt it is not hard to get it to hook up on asphalt all you would have to do is take some screws out of the top deck. I dont own a xray but everyone around me does and some guys with the 008's switch the pulleys to the 007 or the 009 pulleys but i dont remember what that does i think they said more tope speed but you shouldnt have to worry about that but later on when you can drive consistently without crashing a lot you could look into this and try it. Hoped this help
Team Terribles---------2009 post of the year
"Cant you read Mopar???He said that he drives a T-max 2.5!!!!"
Spec classes are for communist