I'd like to see the Magic play Nelson + Vince + Lewis + Bass + Dwight lineup once Jameer gets back and healthy. I wouldn't take on a player like Boozer until I was fully convinced that switching to a big lineup is more beneficial for the Magic than their current setup.
Orlando would be taking a large decline defensively from Lewis to Boozer at the PF slot plus Lewis was a lot less effective defensively at the SF spot rather than PF. That was before Dwight Howard + SVG though, so maybe things are different now, but I'd want to see that before committing to a player like Boozer.
Brandon Bass is the perfect player to try out in that role. A test-dummy for Boozer. Only, Bass is capable of playing good-to-very good defense.