I think the blisters that worry me the most are the ones that come back after "repair jobs." There's some rather disturbing reports of "bad repair
jobs" leading to worse problems than if the blisters have been left alone. We walked away from a boat with blistering problems two years after it had been peeled and epoxied.
We looked seriously at a Ericson 27, and there was a recent article in 48 North
about one that the owners really liked (but I don't think the article is online). What worried me a bit was the Practical Sailor review that suggested its performance could be better. We ended up with a C&C 27, but other close contenders were an Islander 28 and a Cal 2-27.