lipos that fit?

Took me a while just to even find the Dynamite 2s 5300 that is recommended on the Horizon Hobby site. I bought 2 of them and got about 10min off each run. I think I did not top off the charge enough because I forgot to turn off the mah limit on my charger. Each new battery only got about a 400mah 5min charge at 5A, but still I think there are better lipos that fit out there.
The Dynamites seem kinda heavy already though, the boat also leans to the right a lot. lets see what works:

Brand:
volts/cells:
discharge(C) burst rate:
mAh:
ESC:
location in hull:
run time: