Why are you selling the PF500? Just don't play it very much? I was very interested in those at one point and occasionally still feel like I could use a little more grit or fullness in my bass tone. Once I start considering that sort of stuff though, it's a long and rough road that lies ahead.
Eric, being as lazy as I am, I keep the PF500 hooked up to a cab in my practice room and leave the Aggie in my amp case for band practices and rehearsals. I've found that the Aguilar does the whole vintage bass tone better than the PF500 which means that I see no use in having two vintage-voiced bass amps. But, I have no compelling reason to sell it and may just keep it. I'm starting to like the idea of keeping minimal gear though.
If you want grit and fullness, I'd think that Sansamp would give you all that?