Good observations.
If you're not going to shoot tournaments, then I wholeheartedly recommend the AMS Retriever.
Mine is still going strong after more than 10 years. You will save money with one in the long run.
There's a finesse to how hard you need to pull on the 'trigger' to reel line in fast. Keep the opening facing the fish and it reels in much easier. After the shot, use that trigger to keep extra line from coming out. These things you'll learn easily, but it won't happen on the first day.
I also recommend the regular retriever over the slotted retriever for regular bowfishing. Use the slotted for sharks and other 'big game'.
Be sure to use safety slides with the retriever. When you get a chance upgrade the line in the retriever to the heavier Muzzy line. (not the 600lb gator line)