If you want something more akin to an alnico but sticking to a less expensive ceramic, the the Celestion Vintage 30 (It's Eminence eqivilant is the Governer) is hard to beat. The V30 was designed to emulate the cone movements of their early alnico G12's.
You hear all kinds of things about the V30, such as they are too bright and harsh, especially open backed. After awhile I started believing what I was reading instead of trusting my ears, and wondering if my hearing was damaged or something? But when you can A-B the speakers to many others; the V30's are among the warmest and sweetest. The mids are strong and thick, so maybe thats what these people are precieving as bright? My v30's are well broken in by now having been played for years and years, so maybe it's that, but there are not too bright and harsh to my ears.