Will if ya don't want a progressive, discount dillon UNLESS you think you might want one later, the Dillon 500 can be upgraded to a 550. I have no idea of the cost for upgrading. Probably near the cost of another press, but I really don't know. Progressive presses that are manually indexed can be used just like a single stage or a turret press.
I have a RCBS Rock Chucker, it's old, used and abused, it has been through a fire and a flood and still going strong. I think everyone who reloads should have one.
I like the idea of turret presses Lyman's T-Mag keeps catchng my eye. You can put three sets of rifle dies in that sucker and just leave'em. Then if you have more die sets than that, just get another top knot for the thing and start all over again.
Most die sets use a universal 7/8 x 14 thread, some do use a propriety(sp) die thread but they are the exception rather than the rule.
Sholdered cases are no more difficult than straight walled, you just have to lube the case. Hornady "One-Shot" is an areosol spray that will make short work of lubing the cases. You can get carbide sizing dies for straight walled cases that don't require lube on the cases.
Lee, I had a Pro 1000, for less than a month, it took me that long to find some sucker to take it off my hands. It would not do the things it was supposed to do, and the things it was supposed to NOT do, it did. (I have a Lee Load All that I wouldn't take stock in Microsoft for) Lee seems to be "iffy". I do have some Lee dies, no problems at all.
Most manufacturers will produce a dud, and will have a service rep that's having a bad at one time or the other, but for the most part all the major manufactures will give you a quality product and gud service to make sure it stays that way, otherwise they wouldn't be around long.
This has helped a lot, huh!?