You need a G35 to help you get to the head of the class. I have not seen any G22's in USPSA Limited Competetion in the last year or so. The Hot gun for Limited 10 is the G34. I have a G35 with +4 mags and it rocks.
I currently use a Glock 35 in production. I will use the same gun when I jump to limited. I picked up my 35 (comes with two mags) plus 3 more mags for just under $700 new.