Shimano Tranx 300 or 400
I went with a 400 "regular speed" Tranx with a power handle and it dominates 10's. The only issue I've encountered with the reel is that after time the drag loosens up so you have to re-tighten it every trip. With that said, it doesn't engage mid-cast like the revos which is a far greater issue. I still like my high-speed Lexa for rubber and jerk baits though.
I bought a 300 last year. I've only used it for northern and bass and am happy with it for that and maybe light musky fishing(will try it this season). If I were to buy one strictly for musky I'd go with a 400 and even then wouldn't expect it to be the workhorse the 500 is. First thing I noticed with the 300 was made in Malaysia stamped on it. I was expecting Japanese made like the 500. Not sure how much that matters though.