Speaker upgrade - please advise.


Hi, I'm looking to upgrade pretty soon - most likely speakers, and I'm looking for any ideas you guys may have on the right choice. I'm looking to spend up to $6,000 used. My current system is listed on in the 'virtual systems' on Audiogon, but here goes:
Bryston 4bst power amp
Sonic Frontiers Line 3 Preamp (with tube upgrades)
B&W Nautilus 805 speakers
MSB Link DAC III & Monolithic Power supply & Upsampling
Muse Model 5 Transport
Kimber KCAG, Cardas Golden Cross analog interconnects.
Nordost Silver Shadow digital interconnect.
Stealth Triple Ribbon & PC Premier speaker cable
PS Audio 300 Powerplant
3 Shunyata Sidewinder Power Cords.

I'm thinking of moving to tube amplification at some later date (BAT or Sonic Frontiers), so will need speakers to match that set up. The speakers I'm really considering are Dynaudio Confidence 5. I'll also consider B&W Nautilus 802, but suspect there's better out there at the price. Anyway, any advice is much appreciated (also, if you see other potential upgrades in other components, let me know). Thanks!
John (Outlier)
128x128outlier
Guys, Just wanted to mention that I've made three upgrades, one of which is the speakers. I replaced the Bryston 4bst with Blue Circle BC2 hybrid monoblocks - a very nice addition, bringing less brightness, more transparency and a sweeter more open soundstage. I then got a Rel Strata II sub to beef up the bottom end as the Nautilus 805s are a little lacking there. Now the system is quite robust. Finally, I'm expecting delivery of a new pair of Audio Physic Virgo IIs to replace the Nautilus 805s. I got a great deal on them, but I hope I'll have enough power (75wpc) to drive them well. They operate at a 4ohm speaker load. Anyway, we'll see. Next upgrade is CD player...........it never ends....
I have owned most of the speakers out there, C5 is a very special speaker even Temptation will admire as C5 use some very exotic soft midrange dome which cost over $800 a pair. The midrange is incrediblly fast and transparent, put some electrostatic to shame sometimes. Problem is they don't work well with tube (I tried them with SF Power 3 and they clip all the time), so mate them with a Pass Lab or Plinius.
Outlier- Did you get the subwoofer knowing that you were moving up to the Virgos? I would think that they have plenty of bass, especially in a room 18 x 15. Let us know your progress.
you may regret it. These are some of the finest 2-way speakers you can buy at any price. Stunning. All music forms sound excellent on the Arcus which responds well to a solid 50wpc and above, SS or tube. I auditioned many of the speakers listed here before buying the Arcus and haven't looked back. They, like other Avalons, have had excellent reviews. Suggest you check the AvalonAcoustics.com website for more information. Good hunting!
Djlackey - you were right. I don't need the sub with the new Audio Physic's. They more than perform in that area. Hence I'll be selling the sub soon. Also I upgraded one interconnect to SPM refernece, and got a YBA CD1a. Both upgrades were amazing. I'm so happy with the system now. Just some more cable upgrades and I'm set....... for a while :-)
John.