They are not at all cheap but after Claudius’ accident I got concerned about safety stirrups and bought a pair of Free Jump Soft Up Pro stirrups. I also have a pair of HS Bow Balances. The Free Jumps are the nicest stirrups I have ever had, they are very stable and extremely safe IMO. The only thing I don’t like is that it is hard to run them up. I ride young horses alone 100% of the time, though – can’t change that part – I wanted the safest thing I could find and was willing to pay for it. I bought them from Amira equi which was substantially cheaper than you can get them from US tack stores.
I do not like the peacock stirrups, I have seen several accidents caused by riders coming down on or having the hook catch them on the way down. Serious, disfiguring accidents involving major stitches in two cases, one an adult and facial. truly awful. Better than being drug maybe but I would go with other options, we have them these days. Some like the S stirrups and cheaper flex models are not expensive.
I like the Sprengers for ring work fine but they are not great in water, I find them quite slippery when wet. They are also not stable, so unless you have a good leg they amplify all your issues. They do help alleviate some of my knee pain from when a horse fell on me and crushed it fifteen years ago. Horse people, none of us would pass a vet check.