If you go RB. You need to stay with it. But also have the need for one is a important part. Are you doing Deco work? If so. Yes. I'm not to big of a believer in going from OC to RB and back. There are skills that I need in a penetration into wrecks to practice and keep ingrained in my head. Rebreathers can and do kill people. Best to be extremely familure with them. And don't get complacent. Run your drills. Practice. Use it. If you let it sit in the corner for a year. You need some type of refresher and more practice before you go diving into anything deep or penetration. People are people and they forget.
Had a Rebreather for a long time now. Built a few of my own. I do enjoy it. I went the route regularly when I got silted up from someone else in a wreck at only 150ft. I stood my ground to see if it would subside. It didn't. I slow tracked to the exit. It was a wall. I reached 3 feet over. Found my exit and in that 3 feet it went from zero vis to 40 feet vis. I decided I needed to not risk myself and rethink my diving. And that was only swiming to a big hole in the side of a wreck, Swimming in about 5 feet, someone coming in and silting the room up, and not seeing a way out. So now, I have 8 hours of time to save myself on my back. Could be a lot of deco, but I am OK with that over dying. LOL..... Also, it is so much cheaper on deco gasses.
I've dove a few. Some I love and wouldn't buy. Some I like and wouldn't buy. 2 I like and would buy. And, of the 4 I own I dive them all. 2 are home builds. Read, Read, Read, and take classes on at least the top two units you like. It's a lot of money, but you'll learn a lot and figure which you really like best.