Pioneer wil release their new screens next month. The last sery was very very good, and the new ones will even be better 😐. Don't know what size you're searching, but the 5080XA or XD has got a very good picture. It is also very stylisch because it's just like the bv4 (no speakers, just a nice frame (without roundings)). It should cost about 2500,- euro's and the new 5090XA (1080P) or XD is around 3500,-.
For 42" I would recommend the 428XD (2000,-) because it's looking better than the 4280 with rounded corners. Panasonic has got the pz85 that's also good looking and about 1300,- euro's. It isn't as well made like Pioneer, but for the price/prestation it will easily win.
Why do you want a Beosystem 3 ? Just buy a Beo-5 and you can remote your non B&O tv as well 🙂.
The 5080