Browsing through some forums I don't regularly visit and stumbled into here. If it's something something which I intend on framing then my go-to place has been Pro Photo Connection in Irvine, usually using their pearl paper. As a member of the South County Photo Club which they're a sponsor of I get a discount. I'll have to check out ArtBeatStudios, they're actually a little bit closer to work than ProPhoto Connection is.