From what I hear the Pulse XT is an awesome second plane. I am in a position similar to yours and am looking into a Pulse 40, so I can use my .46 that I already have, and then get something really great for a 3rd setup (once I'm comfortable tuning, flying different planes, etc.). I also was thinking about getting something bigger too, as I figure I'll want to get into a bigger plane at some point, but like I said, probably for #3 once I've trashed a plane or two.

From the list I like Pulse 60 w/ Saito. And I can't say I've ever seen someone regret having extra engine - there's even a saying "there's no replacement for displacement."