I don't see that as unreasonable. Salty to the White Sox for Floyd is a great match up. But Haren would be tricky at that point because they would have Lester, Buchholz, Haren, Floyd, Lackey and Doubront. Maybe Lackey starts on the DL. Or the Sox pull the trigger on a Myers deal and look to add a SP later in the season if need be?
Hamilton is tricky also, but it doesn't seem like he is getting those long term options. So a shorter deal with bigger AAV could actually work. 3/75(25M AAV), 4/88(22M AAV), 5/100(20M AAV).
5/125 is absolute comfortable limit, and I made need a couple tums at night