Twin Force Brushless Questions

Hmmm, I just read an article about a guy who setup a brushless lipo emaxx that gets 45 minutes of runtime!!

He was running a Lehner 1600 and 2 11.1 v 4400mah lipo packs for ~24 volts. (using a Warrior 9920 esc as well )

This is something I might consider as i'd have to buy 3-4 sets of NiMH to get that much runtime. I checked some Lipoly packs and found some 6300mah 11.1 packs for $169. So that would be $340 and 3 sets of NiMH would run me about the same no? I'd also be creaping up on 1 hour of runtime I would assume? Hmmmm....

I wonder what kind of speed he was getting, not that I need a lot of speed. I plan on using this for bashing, don't plan on getting into racing.