My contribution here may not be useful but thought I'd post. Most of the time, impressions based on an audition at the dealers will not be the same as the listening experience at home. Also, one may find satisfaction for several months but over time, the flaws or shortcomings of the speaker may start to show up.
I used to own the PMC LB1 Signatures many years ago (bought from a local dealer) and have listened to several large PMCs at the dealers IB1 upwards. A friend used to own the EB1i and I have listened to it before (he has upgraded to large Wilson speakers several years ago). I don't have experience with the current PMC models but based on my previous experience with the old PMC models which have their own house sound, I won't be going back to the PMCs as I find the presentation to be bass heavy with a lack of detail at the top-end. That's what my friend who owned the EB1i thought as well after he upgraded to the Wilsons. In the end it's all down to personal preference so take the above with a grain of salt.
Personally I would more inclined to pay more attention to the Proac D20R, Spendors and Kudos.