Savage project idea. Please read have many ?'s!

[BL_RV0]

I've decided that I am going to build a Savage on (sort of) a budget, and decided that I would like to try A123 cells in this setup. It will be HV, don't you worry. .... So, my setup idea is a Mega 22/45/2 if I decide to be on a budget, or a 22/50/2 if I wanna spend a lot, or if I decide to go completely all-out, a Lehner 1950/10. Here would be the a123 cell counts.
22/45/2: 33v, 10s A123
22/50/2: 39.6v, 12s A123
1950/10: 33v, 10s A123
for the Mega motors, the controller would be a CC HV85, and for the Lehner it would be a CC HV110. here is some gearing ideas based on those voltages:
22/45/2: 13/49
22/50/2: 12/49
1950/10: 14/49
the gearing choices are based on a 3 speed transmission, the stock Savage X SS kit spur gear, and 7 inch tall tires (Losi claw. (stock tires on the LST1.))
Now, about the batteries. I found these:
http://www.hobbycity.com/hobbycity/s...idProduct=6444
And were wondering if they're any good. I also found these:
http://www.hobbycity.com/hobbycity/s...idProduct=5632
Are those any good? Which of the two I linked would give better performance? Do you build them just like you do a NI-MH pack? If I use one of those two cells, is my Hyperion EOS1210i capable of charging a 10s or 12s pack? Or would I need to build 2 packs and run them in series? Do you need to balance the packs?
As you can see, I have very many questions about A123. If there is a different cell that I should look at please let me know, thank you for reading this, and thanks for your help in advance!