best USVTA lipo is the Reedy Wolfpack 5000 25C...imo...its been a great pack for almost a year...the IR are not as high as others, but it deleivers time and time again...and the price is great too
http://www.teamassociated.com/reedy/parts/details/736/
EAM is tops as well...only ran it a couple of times, but I know EA, and he puts out great products