Oh I thought the panny 8UK was the UK version of that plasma. Hm, well, you learn something new every day.
15 to 20% is a very good deal. In Norway we get 0% on B&W and no discussions no matter how much you spend. They will give you 50% off of the cables you buy with the speakers though.

I've heard that B&W frown on too much discount.
I didn't mean you should have the HTM4 with the FPM - if I were getting FPM's I would do it all around and if I were going with the SCMS I'd do them with the HTM4 (all of which have the same drivers as the 805S). The HTM4 can be mounted on the wall above the plasma and tilted down so the tweeter is pointed to ear level at the main seating position. I'm not sure if B&W or others do a wall mount like this for centers but I've seen pictures of people using adjustable wall stands designed for CRTs.
Have you sat down and actually listened to the FPMs and then the SCMS or better yet, have them set up side by side and do an AB comparison which is the ideal? If not you should try to find a dealer that will do that for you.
The Rotel thing.... well, hm. B&W state some pretty low min impedance for some of their speakers - the SCMS has a min of 4.7 ohms and the HTM4S has a min of 2.6 (!) – so in that respect it wouldn’t be wise to try to run them off an el-cheapo receiver. Rotel is "
supposed to be more able to handle difficult loads" compared to mid-fi receivers like the Denon 4306 but I’m not sure how well that actually works in the real world. Take a look at the 4306 review that’s been done here on Audioholics and it looks as if it can handle pretty much anything within reason. If it turns out that it can’t handle the load and clips at the volumes you listen at, well, you just add an external amp. You have a lot of options over there that will give you far more bang for the buck than Rotel amps too – people talk of Outlaw all the time and they also rave about Emotiva too. My guess is that most if not all of the Rotel receivers would clip before the 4306 or any of the higher end receivers from Yamaha.
A lot of this depends though – these Denon and Yamaha receivers have a lot of the latest and greatest features and you may not really want or need that complexity so a simple Rotel solution may be more suited to you?
If you’re interested – I have the 804S on order (6 weeks and counting now and I’m very annoyed by the delay!) together with the HTM7, a Denon 4306 and a 3910. Next year I will probably add a pair of 805S/SCMS and change the HTM7 to a HTM3. I also have a SVS PB12plus sub. I’m hoping the 4306 will have enough to drive them to the levels I want but if not I’m thinking of getting either a NAD M25 or C272 amp (unless someone can suggest something better for the price that I can get in Europe).