I think you're right about the load, I've bi-wired Sonus Faber Concerto's (6 ohm load)with an old NAD 3240PE 40W integrated using A&B speaker outs with no trouble, even at high volume.

The Dantax Vision's look pretty sleek and sexy... Let us know how they sound with the 2150.

Enjoy!
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Outlaw 976, Outlaw 7700, Pro-Ject Phono Box S
Sonus Faber Domus Grand Piano (F&C), Niles HDFX (Surr. & Rear Surr.), Outlaw LFM-1 Plus, Velodyne SMS-1
Sonos multi room audio
Video: Sony KDL-46V2500, OPPO BDP-103, TiVo Premiere XL4
2-channel: Outlaw RR2150, SF Concerto Home, Outlaw LFM-2