In your January 6th post you are " surprised that a $4400 gun doesn't have a metal grip." Did you actually have this gun built without Johnny or Julian going through the build options to provide you with exactly what you wanted? Was this an instock gun and the build wasn't noted? My dealings with Limcat have been great and it is no wonder they are immediately responsive to your concerns. Perhaps you should have called them first.
Faced the same decision last month. I have 2 650 with multiple heads. I shoot primarily 9 1nd 40. I know the 650 well and decided to add the Mr. Bullet Feeder. I'm very happy with my decision. The Lifetime warranty and sevice has been miraculous. Now I'm thinking about an ultrasonic cleaner!
I spoke with C More on the the 7th. The representative doubted they would be showing an RTS3 but did confirm they are always working on new projects. I asked if a new RTS 3 would have the same footprint as the RTS2 and was told it would be identical. I was told C More is continuing to develop the RTS2 product.
I started with a 550 and had a double charge after a few weeks. I sold that machine and went with the 650. The safest thing I ever did. 40,000 rounds and no double charges. The case feeder really reduces the workload and a Mr. Bulletfeeder is icing on the cake. 650 all the way!
Update. My RTS2 died. When I purchased this gun the sight was a year old. I'll send it back and open they can straighten it out, My backup has a new RTS2, about 2 weeks old, and so far no problems.
Montana Gold and Zero JHP seem the overwhelming choice of competitive open shooters. There is no price advantage to shoot anything else. I've tried coated 125s but they are not accurate at major power velocities.
I just started myself. There is no reason to buy a new gun unless you want to. There are a steady stream of used guns on the forum for less than $3000 that have all the competition upgrades and possible magazines. The Tru Bor recommendations are spot on and you can always ask for opinions about builders on the open forum. You may not always get consensus.