I am an unashamed fan of the Lee Load-All II, especially with respect to its simplicity and out-of-the-box versatility. It does what I want, and I'm happy to live with its downsides, but with the regularity you're shooting you may not want to go as slow as it wants you to.
Also, it does not (or at least mine does not) appear to have a 3/4oz shot bushing, so if you want to throw these, or international (24g regulated) shot charges, you are out of luck with that one.
If I knew I would be shooting 150 rounds a week, week-in and week-out, I'd have bought a MEC long ago. Until such a time, I'll stick with what I've got. You would be well advised to go straight to a MEC.