I disagree..... I have a .22 Marauder, a .22 Disco and a .177 Disco... I love all 3 of them and I still shoot my Discos all the time. One of the things I absolutely love about the disco is the 2000 psi fill, actually the "sweet spot" on both of my discos is 1800 psi. I get 35 good hunting shots with a fill up and while I mostly use my scuba tank for refills I do still use my pump once in a while and it's a breeze to pump a disco back up to 1800 or 2000 psi after my 35 shots. I also like the very light weight of the disco.... it's a pleasure to carry around on long hunts or pest control hunts. Don't get me wrong..... I LOVE my Marauder and take her hunting all the time, but I still love my discos and use them all the time. Yes, you can fill a Marauder to 2000 psi as well and have the same advantage as the disco, but if you have the ability to shoot at 2500 or 3000 psi, human nature being what it is, you're probably going to do just that,,,,which means much less fills from a scuba tank and a lot more work if you're using a hand pump.
So,,,, my advice would be get yourself a .177 Disco and enjoy it. Then go ahead and get yourself a .22 Marauder.... you'll have the best of both worlds. BTW.... that .177 Disco will be a great target gun, a great pest control gun and a great small game gun as well.
Jeff