XXX-T System Help

I purchased a Novak 5.5 system about 2 months ago for my XXX-T. The system works great and my truck is pretty fast with a 6 Cell IB4200wc pack. But like everyone here I am now looking for more speed :cool: and I can only run 6 cells on the Novak:mad:!! I am thinking of switching to a Mamba Max 5700 with a
3s lipo from MaxxAmps or 8-10 IB4200 cells. How fast do you think this setup would be in my truck and does anyone have any other suggestions? I just want to get a system that I can make changes to down the road when I decide that I want even more! Thanks for the help.