I've got a Guild Pilot and a B-302. I've got Dean Markley Blue Steel roundwounds on both and they sound just spectacular!
I dearly love both these instruments.
I replaced the original EMG P/J pickups on the Pilot with new EMG-X pickups and upped the voltage to 18 volts. It sounds just grand now; very good before, tremendous now. The boys say it's a tone monster.
The B-302 was modded before I got it with a series-parallel pull switch on the front pickup volume control and a phase micro-switch. Crazy range of tones.