I've done some digging, and most of what I've found says you can use a dimmer to it's full capacity, but most wouldn't recommend doing so, which could cause the dimmer to fail.
I'm having trouble finding a 1000 watt 3 way dimmer that matches the everyday toggle that is in the rest of the house. Best I can do is the 600 watt Ariadni from Lutron, and it will be ganged with a normal 3 way switch from a separate circuit in a single 2 gang box. Not being able to find a higher wattage dimmer means the fins would have to stay in place, right?
It would be running 12 50w PAR20 bulbs, dimmable LED's, or a mixture of the two until my stash is gone. This switch is rated to have multiple styles of bulbs combined in the same circuit, but I'm curious about its results with combined bulbs.