Looking for a new BL system

[neweuser]

I have been pondering a long time and burned myself buying the HV. I couldn't wait to go BL. But, will be saving money as my ex wife took my tax money. But thinking of something like the 10xl w/9920 controller. I run 14 cells now and as i've said before, i'm KNOW i'll want more later. The controller you guys said that it would take more cells later. What's your opinion on this set up? I want to eventually get to the 40 mph range.:028: