depends a bit on rules i'd say. the tb03 and really any other SD car might be real good to you. granted i didnt see carpet or asphalt. and if u had plans to move up outta 540 w/o another car. do urself a favor and if u go tamiya, go get the 'R' versions. saves bread very quickly. u get all the good bits for the price of the shock kit on top of a regular model. this applies with the ta05IFSR, dont think there's a TB03R yet. the Cyc S is another great car thats really low on the budget. somethin like 125 at speedtech. can really make that car work and move it up as u need. also a very good T/A platform if ur track does that too. be real hard to look beyond those 2 companies for a new ride. used rides could be an alternative, but honestly start anew and have a go.
R