One the of the best bags I've ever gotten was also the cheapest. At Academy sports in Texas you can get these cheap-[*****] "Golfmate" brand bags. They are actually made for disc golf, and hold up REALLY well for the 9-12$ they run (9 bucks for the small, 12 or 13 for the large). The only downside is that the strap is attached and would require major modifications for a quad-shock to be attached. Also as far as larger bags go, I'm currently using the PDGA Tour bag with Phenix quad-shocks and have yet to see one loose seam!