Ljay gave you the best advise as far as sound quality, If you where going to rip a bunch of full length albums, that would be a good route to take, but before you spend a dime, try using what you already have. I own both a Bozak and an Urei, and unless you have bionic ears, you won't be able to tell the difference whether you made your sample using a Bozak, a high dollar phono preamp, or your Rane mixer. Unless your needle is completely shot, I wouldn't go out and buy a new cartridge either. I own a Shure M97X cartridge, it is an audiophile cartridge. I have it mounted on my SL-1200GLD, There is not a night and day difference between that setup and my old mk2 with my m44 cartridge on it. So I would try recording first with what you have and see how it sounds.