I think Lalime is a good goalie, too, but his playoff play seems to inconsistent to me. He can be awesome for a series and then not good enough the next one (2002 he was amazing vs. Philly but not so much against Toronto) so I don't know if he can be counted on to win it all. There have been 2 games in the past week where he's given a lead late in the game and hasn't been able to hold it (against Dallas and last night's Leaf game), and I'm sure giving up 10 goals to the Leafs in 2 games isn't exactly encouraging.
Personally, though, I wouldn't make at trade, since there are no clear-cut upgrades over Lalime available right now. People can talk about Burke all they want, but in no way is he an elite NHL goaltender. Kolzig may be available, too, and maybe Roman Turek, too, but they aren't going to be upgrades.