You could do a setup with 10 cells, but it wouldn't be too powerful. If you did, the Feigao 8L would be the motor to use.
Here's a link to the most recent pictures of my buggy:
http://www.rc-monster.com/forum/show...3&postcount=33
SH Z-Car, Custom Crawler, 8s Savage,
12s XTM XLB 1/7 buggy,
4wd 4-link rear/IFS Pro4 truck,
Custom Hyper 10 Short Course,
Belt-Drive Mammoth ST 1/8 truggy, 4s 17.5 MM Pro HPI Blitz