Rather than buy what other domainers are buying, buy what other domainers are selling. Or better, buy what end users need. Most domainers are losing money.
Audiofish has end users already using that name. There may well be other reasons for the high price, including existing traffic, backlinks and more. If you can't understand why the price is high, then it's not a good idea to buy imitations. (Also, many domains are sold for far more than they are worth. Those are one time events.)
Nothing wrong with audiotiger as a brand, except nobody is using it. That's the best of your 3 names by far, but it's a bit of a lottery ticket. You have to hope someone names their project audiotiger, and is willing to pay for the name. It may never happen, but you will have to renew the name each year.