Rega or VPI

I currently have a music Hall MMF-5 with a shure V15VxMR cartridge. My local dealer has a Rega P25 with the RB600 tonearm, on consgnment for $750. I am tempted to snap it up. Would there be a noticeable difference in the sound quality? Would I be better off waiting and spending a little more on a VPI? Would the Shure be a good match for a while?