It's been $48 at Gamefly for a while now and I'm sure it'll be that price on GMG, too. Previously they did say they would like to price it less than the past two games but that it was up to the publisher. It really should be cheaper.
As far as BL2 vs BL1 goes, both had their moments. BL2 had many improvements but there are some areas that weren't addressed to my satisfaction, and also I feel that BL1 was better in many ways. I also feel that depending on how you approach the series - whether as solo, coop, console or PC - determines your take on it.