100% this!
I started with a 550, learned .45 and .308 on one when I was 13. Bought one 5 years later and it's only gone downhill from there... I still have my 550, but it's solely for producing precision rifle ammo for 3 short action calibers.
I bought a 650, for a smokin' deal through the board, and loaded several thousand 9mm on it with great success, but found myself wanting to tweak pieces and parts here and there, so I started poking around at the idea of a 1050.
Hoser's posts, as usual, answered a bunch of my questions about getting into the 1050's, so I started watching for a deal/used one.
I was actually only planning on buying 1, but due to my impatience and how ebay sometimes works, I very quickly ended up with 4 used ones...I was on a work trip for 6 weeks, hotels get boring even after 12-14 hour days, and my wife literally sent a picture of the 4 boxes captioned "WTF did you buy NOW?!?!?!?!". The best part? Two of them came with Mr Bullet Feeders...
I have since sold off 1 of them to a shooting buddy, and have one setup for small primers, one for large primers, and the third currently is nothing but a 300BLK resize/trim/resize machine...
As much as I liked the 650 compared to 550 for mass producing plinking/whatever ammo, the 1050 is that much better and more than the 650.
They are worth the extra money.