Critter,
There are 3 in-line ML's on the market right now that are pretty well the "cream of the crop" IMO. They are:
1) T/C Omega .50
2) Knight Disc Elite .50
3) Savage 10ML-ll
With any one of these three ML's, you won't go wrong! Another gun that can certainly be included would be the T/C Encore, although it is not a "pure" ML as it has the capability of switching barrels. Go to a gun shop and try them all on for size and buy the best that you can afford. Then ENJOY!