The Opamp Labs stuff has a pretty good rep. Be aware, though, that the lower-cost supplies are unregulated. Keep an eye peeled for used or NOS Opamp Labs supplies on evilBay; they turn up every now and then, and usually sell for cheap.
I recently bought a lot of used and NOS +/-24V supplies made by them, and I'll post about them when I get a chance to check them out.