I still believe it should not take $1500 to shoot a .22 pellet accurately... I mean if you've got it like that by all means, but to me jumping straight into a high end gun skips pass a few options.
$600 - 800 gets you a lot of gun in .22 / .25 imo, and may be fine just as it or you can get a little work done to it by the hundreds of tuners that are out there.
I just completely tore my Mrod down for the 1st time, this after having it tuned just a few months ago. Have to say honestly had this been a $1500+ gun I probably never open it up on my own, just like I have no problem doing Volkswagen repairs, but I have to take the Ferrari in to a mechanic just for an oil change...
It felt very rewarding putting all the pieces back together and dropping that regulator in and tuning it to were I want it to be, hard to explain, but its close to the feelings experienced when I caught a fish the first time on a fly I tied myself.
Air compressors and tank...
I just found the best dive shop not 10mins from my house. Their compressor is the size of a small room Bauer that filled my tank to 4500 in less than 5mins, before the compressor fully got up and going. It even surprised the owner so much I'd already paid for the fill so he gave me a free fill card and phone# to call so that I could arrange a fill if I needed one and didn't have a lot of time.
He also told me stuff about air tanks that I didn't know, and in general is a really cool guy. I told him that I was planning on buying a compressor but I know that there's no way I can fill my tank as quickly as their compressor just did, so I'll probably end up picking up a second tank when I get my big bore.
Between shooting 72 shot strings with my Kral .22 which btw at it's price point 72 shots at 36 fpe is unbelievable in a non regulated gun, and tuning my Mrod my tank is back down to 3K psi, so I have had to top off with my Hill hand pump to get to 3200 start point on my Marauder, could not be any easier there's nothing wrong with having a good quality hand pump as a back up.