Speaker Upgrade

I am looking to upgrade my speakers in the used market. I am considering The B&W 803D, Sonus Faber Cremona M, Dynaudio Confidence C-2, and Usher BE - 10.
The room is 20x20 with 18' ceilings. They will be mains in a 5.1 set up for SACD's, audio Dvd's and home theater. They will also be used when 2 channel listening. The amp is The Emotive XPA5 at 200x5.
Your input will be greatly appreciated!
The speakers you're listing have so different characteristics, that I'm not sure what you really aim for upgrade or listening needs in general.

I would subtract B&W mentioned since they will not sound right with your amp.

Due to your extreamly high celiings, it's encouraged that you will build an acoustic trap another words building a stage 'tent'.

Please keep in mind that dealers often sell used speakers so you can pick them up to avoid shipping problems and charges. Not that I encourage or have any kind of interest recommending any dealers or stores, but definitely if possible, buy them locally. In Phili/Jersey I think there's a tons of possibilities from dealers and private sellers.
Magfan, I saw that too, but was so put off by the window shopping, I refrained from posting.
I am heading to Overtures and Hi Fi House this evening.
Soundex is appointment only and it has been tough nailing down a time.
Put off by window shopping.... are you serious? They put in a cd, give me a remote and walk away. Such is business.... if their prices are reasonable I will buy. How do you select gear? Do you send someone thousands of $$$ without listening?
I go to shows, listen to other's systems, etc. If I go to a shop to audition gear, I go with intention of buying if I like the gear. I don't try to compare the prices of new gear from those with overhead to the prices of used gear from those that don't have the same overhead. If buy used gear and like it, I keep it, if I don't like it, I sell it. I try to treat others as I would like to be treated.