I've haven't gotten into pithing dregs yet. I've got so many cultured strains going it never seems like a good idea sober and I try not to open really nice beers when I'm drunk
JP is supposed to be great, as others have said. Look for the lower alcohol beers in the Bam series and for fresher bottles. They're all coded or dated.
I think Rayon Vert dregs would be great to pitch, into a similar West Coast Orval styled beer. Best bet IMO would be to grow the dregs up and then bottle condition your base beer with that.
Definitely look for the Logsdon - funky or not. I'd love to see some of his saison Sacc strain show up in the mail
Cascade is supposed to be amazing - 'Best US sour I've tried' was the phrase that got me to shell out way too much for the bottle I've got in the cellar.
I haven't tried Anchorage yet, either. Picked up a Galaxy White IPA yesterday. Also too expesnsive, not quite as bad as Cascade. It's got the magic 90 score I look for on BA and the interview with Gabe Fletcher on Sunday Session is worth the $20.