I think several of those players would be an upgrade. The question is whether the upgrade would be substantial enough to make it so one of your two moves get burned. Given that rule, there will likely be players available of this caliber most of the season, so it's not as much a question of vanishing assets as much as whether to pull the trigger now or later. If it was me, I'd probably do the move for McTavish, as he's locked into the top six and don't forget Anaheim will have Killorn back at some point too. Jarvis looks great too, but as you said he could be hurt by the numbers game if he falters.