The manual is on
http://www.hobbyking.com/hobbyking/s...X606372X41.pdf and apparently it'll run down to a 5.5T in an on road chassis, so pretty much anything you want will be ok. (A 5.5T brushless should be good for ~100kph or more, flat out, given a big enough track.) So anything 10.5/11.5/12.5 will be fine. Hobbyking/Turnigy motors aren't bad either (Trackstar is their in house brand, but they have others)
If you are going to buy from Hobbyking, their nanotech batteries are good, something like a this, with a reasonable burst rating (the 50/100C bit, 50C is continuous, 100C is burst) if you get too weedy a battery you may damage it by pulling too much current from it. So a reasonable size and rating is worth looking for. Any LiPo won't do)
http://www.hobbyking.co.uk/hobbyking...Lipo_Pack.html isn't bad.
You'd just need to add some 4mm bullets, 12awg wire and you'd be pretty much good to go. Except for a charger
http://www.hobbyking.co.uk/hobbyking..._DC_w_PSU.html this is a copy of the UAC50 charger, which is a good all in one mains charger.
You can get all this sort of stuff from UK based shops too. Might cost a bit more, but you get the back up and some help with what to buy.