I have the Epiphone Les Paul baritone, which I bought via craigslist a couple months ago. Pickups are stock. I like it a lot, especially thru the AXE FX II - although, like any other bari guitar I've played, it can get pretty thick and muddy on some chord voicings at the nut. The neck feels comfortable, and the string spacing isn't too close together. It's a little neck-heavy if I'm playing it sitting with no strap, but if I have it on a strap, it's fine.
After I had had the Epi for a while, I chanced across a PRS Mike Mushock that was at the local GC. I noodled through an orange rockerverb 50 - it was very nice, but not enough different/better to consider ditching the Les Paul - it seemed lighter than the les paul bari, though. If they still have it, I might take the LP there in a few weeks, and compare them back-to-back and see if I think it's worth the switch.
I also have a Taylor 8-string baritone acoustic, which I have played for a year and a half, and love it. However, I had a lot of work done on it to optimize the setup for me, including lightening up the string sizes, and so the octaves don't go out of tune as I play up the neck, plus it's more capo friendly (I like taking advantage of open strings and partial capos). The lighter strings work better when I tune it at C instead of the B tuning from the factory, although a lot of my friends find it a bit "rubbery" as far as string tension goes.
