Torn between two chargers

[jnev]

I really want to upgrade to lipo batteries in the near future since I have never tried them and have heard so many great things about them, I can't take it anymore, lol. So, I need to buy a new charger, but one that is still capable to charge over 16 cells incase I use lipo and nimh batteries. These are the two I found that suited my needs:
1) MRC Superbrain 989 ($140.00us)
2) Hyperion EOS1210i Charger ($170.00us)

http://www.rc-monster.com/proddetail...MRC_989&cat=19

http://www.maxamps.com/index.html?lmd=39101.487662

I will be building a monster truck soon, that will be running the Mamba Monster Max, but am not sure how many lipo cells it will take. I was wondering if it really is worth the extra money to buy the hyperion charger and to be able to charge up to 12 lipo cells? Also, if I am running two 4s batteries - 8s in all, will it give me a lot more speed and run times compared to running 16 cells instead of just reducing the weight?

Thanks