The Protek batteries seem decent enough. I have been looking at them myself. The 2200's with the 30C rating would be my choice for your setup. They are lighter, can produce the same power as the other 2500 packs (~1300W cont.), and can charge at 2C. The only issue might be runtime.
i plan on running this at the track , so 10-12 min. or runtime is what i am looking for , i think i may go with the 2y and the rcm battery , now i just have to get the approval from the wife