I believe a Dillon is more than you need, and the costs and time associated with caliber changes are significant. BTW, I reload on a Hornady LNL AP and have nothing against Dillon, or any other brand of equipment. Let's take a step back and revisit what and how much you are reloading.
You've been at it for some time on a single stage, and other than being a slow process, have been happy with it.
You currently load for 3 pistol calibers, and may load for more in the future.
You most likely load each of the calibers on a consistent basis, and ease of caliber changes (time and effort) are important to you.
You most likely have all the other related reloading equipment and don't need anything more than a press.
If all or most of the above statements are true, save your money and buy a Lee Classic turret press, Pro auto measure powder dispenser, Safety prime system (unless you want to prime off the press), a few extra turrets (one for each caliber) and an auto disk riser. You may or may not need another die for powder dropping. In any case, it's all less than $200 delivered to you.
Caliber changes take 15 seconds of less and cost about $10 for a turret. Press is auto indexing OR single stage. Production will easily be doubled or tripled over your current single stage press.
You'll have enough money left over to buy another gun while producing good ammo. fmreloading.com is a good place to start.