Thanks for the responses. Some of the brands like PMC and NHT Xd are over my budget, but the others I am going to try to audition once I get further into the process. I anticipate that making decisions even after auditioning isn't going to be easy, because no one place will have all the brands, and the acoustic environments will differ greatly. For instance, it looks to me like Focal can only be auditioned at a working pro studio, whereas some of the others like Genelec, Adam, JBL are going to be at actual "stores" like Guitar Center.
BTW it was seeing reviews on the NHT Xd that in part interested me in actives for HT (that, and already owning a pair of Paradigm Reference Active/40 ...too bad Paradigm stopped making active monitors!) But as I said, the Xd is over my budget.