Trxjw, I like your trade. Much more realistic than what I proposed.
Still, it never hurts to ask for everything. STL really wants to get over the hump. For as bad as we've had it as fans with one ECF since 1997, the Blues haven't been to the SCF since 1970. They've had great teams but always ran into an issue.
As GWOW said, the Rangers gambled hard in 1994. They gave up Amonte for players that would get them over the hump. Sather is a master at this. He has to play the Blues and Sharks against each other and use the Kings, Ducks, Hawks, and Avs to his advantage. The Rangers are in a win-win situation with Cally. Vanek's great but he's not gritty. Moulson is gritty but he's slow. Cammeleri is old. No one has Cally's grit and he's showing it on an International Stage.
If they reach a deal, awesome. If not, he might be able to get quite a return if played right.