Will rifle EVER be in your future?
If "no" then the Square Deal is a possibility. Don't discount a used SD because a Dillon has a lifetime warranty, even if you found it on the bottom of a lake. These regularly go for $200 to $275 used on this web site.
Or the Lee Turret.
If rifle is a "yes", then you're down to....
• Lee Loadmaster
• Dillon 550B
• RCBS 2000
• Hornady LockNLoad AP
The Lee presses are a good buy. Where they 'cut corners' on their scales and powder measures, but the items do work. For a student or budget conscience buyer, they can be good deals.
If your volumes are likely to grow, other family member is likely to join in, or you're likely to be using this for 20 years, then the Hornady, RCBS or Dillon is going to be the better buy simply because you won't be needing to upgrade scales or powder measures over the long haul.
The Lyman T-Mag is what I call a "traditional turret". It simply allows you to hold up to 2 complete die sets over a single ram. So it's little more than a fancy single-stage. If you had only 2 calibers, then you could leave the press set up. But you have so many calibers, you'll be swapping dies in and out anyway. Therefore the feature represents more of a "convenience" than a "higher output". Say for instance in a 2 hour session, you might save 5 minutes. Look at the Redding T-7 presentation on UltimateReloader.Com because it's the same thing.