I would suggest an Xmod or a Kyosho Mini-z. Xmods retail for about $60 they are 1/28 scale and pretty fun for starters.Now for the Kyosho Mini-Z they retail for any where from $90 to $150 they are also 1/28 scale theese are much better than Xmods because they turn tighter have a Hobby shop grade Transmitter and are faster. For Hop Up parts they both have many of them and a fully hopped up Mini-Z or Xmod could exceed $350.
Xmod Link
Mini-Z Link
The picture is blurry but u can still see both of my Mini-Z's The black car is a Mini-Z MR-01 and the truck is a Mini-Z Monster.
One suggestion for a race track would be an RCP track
RCP Track Link
And if 1/28 scale is to small for your liking check out the 1/18 scale. Heres a pic of my Team Losi Mini-LST