I thought G Guitars was seriously boutique-y the two times I stopped in there. I'm not sure what alternatives there are since Daddy's, Sam Ash and Guitar Center have carved up most of the area between them.
If you'd like a look at the Schroeder cab line, there's a dealer in NE CT with good prices but I doubt he stocks anything. I am using a cab with a baffled 12 and two front firing 10s, all neo magnets. The thing cuts like crazy so you can hear yourself and be heard, is all the volume one could want, is rated for 1KW @ 4 ohms, and weighs only a hair over 50 lbs. Check out the website at
www.schroedercabinets.com if you're interested. I think Beaver is dealing these as well.
There are often power amps on eBay, talkbass and Craigslist. It probably depends on if you're looking for the ultimate bass power amp, or very good and portable. The PLX stuff is often available on the used market as is the occasional CA6 or CA9. All the recommendations I have seen point to the former or a Stewart World 2.1 for lightweight power or the latter for heavy but awesome.