Goodwrench, glad to see you're getting what you really want. One question, though..........why two sets of dies? I've never loaded 45 Colt or 454, but I thought the 45C dies could be used for both, like 38 dies can be used for 357 loads. Did I miss something here? And I'll cast a vote for the Lee dies, I have dozens, and have never had a problem with them. The only bad dies I ever had were RCBS, and they cost substantially more than the Lee's!
As for the Lee Factory crimp die, you won't need it. The rimmed revolver rounds will need a heavy roll crimp, the FCD is for rifle rounds only.
And if you find the full-power 454 ammo is a little too stout, you can always load it down a bit. You could also load extra-heavy charges in 45 Colt brass, but accuracy will likely be better if you use the 454 brass.
And like Doug said, pix would be appreciated!
Papajohn