optima's are not terribly powerful and I would never use them as they are too expensive for what you get. I have heard people argue both ways, some hate them some swear by them.
I would have to agree that oddessy are good, I have 2150's (6 of them) in the camper, and they are working out great. I would personally say that Surette or Trojan are probably the best batteries you can get but they cost $$$. I have a trojan deep cycle in my other mog and I almost went with them for the camper but their group 31 is a fraction bigger than the 2150 and I would not of been able to fit all 6 of them.
YMMV
Rob