Well, I've personally dealt with most of them, namely American Classic, Classic Parts of America (formerly Chevy Duty), Brothers, Golden State, F The Filling Station, Roberts Motor Parts (no longer has Chevy parts, just Dodge), GMC Pauls, Paul Parlett, and Harmons. All have given me exellent service and I've only had a few issues, a couple of incorrect parts sent, wi=hich were taken care of quickly and at no extra cost to me, and 1 patch panel that wasn't of the quality I expected, returned without issue. There was also an instance of a part that was shorted, not treally the vendors fault. My truck is an oddball midyear change truck, and needed 1 more bushing than shown in the parts list. The extra one was sent, no issues. I would suggest that you do shop around, because some vendors will have exclusive itams that other vendors won't have. For your location, though, I'd suggest The Filling Station, they're based in your area, so that will help on shipping.
