ESC for RTR Brushless B4.1

[haggis]

I currently run a B4.1 with the standard reedy esc and 3300kv motor. for radio gear i have a hitec aggressor set up.

Ive found it to be a very reliable set up but i would like to change both eventually (probably an 8.5 motor).

My local track is very short and windy where as some of the other meetings i plan to attend use big indoor tracks and i find that my car usually runs out of steam first.

I would like to be able to get a bit more power when needed but retain the drivability.