I used two of these in the TC. Now in the MH doing fine. (along with an 8D AGM) Mine are branded Stark, but same battery. Specs are on the UPG site.
Don't know if this is the best price, says free shipping which could matter.
Don't forget the extra deep in SOC you can go with these instead of 50% with GCs if you compare 225 AH with these for 200 it evens up.
http://www.bestconverter.com/UB121000-100-AH-Deep-Cycle-_p_293.html#.XF8sbUnsZpwI also had two more batts to use with the TC to bank with the two AGMs inside, using the truck bed trick for the other two. Sometimes it was a pair of GC2s. ( I needed four batts for off grid for any length of time with no gen and not much sunshine for solar)
