I think you would be better off getting a used FTT4 than the T4.1 the T4.1 needs upgrades that will exceed the value of the brushless setup that comes with it.. for starters it comes with a gear diff not a ball diff and has no FTT4 upgrades that you will want if you are going to race.. if you just want to have fun then it is fine, just weigh out your decisions it may be cheaper in the long run.
just my .02
Ron