I had the same quandary. Thought about upgrading my 0.5, after I'd bought Von Schweikert VR 4s - I talked to Steve McCormack, who said the upgrade wouldn't do anything to provide more power - just a sonic upgrade. I needed more power to push the VR's bass.
I went to the Rowland Model 10 (after stopping by the BAT VK 6200 x 4 for a bit), and am exquisitely happy. The BAT was on the dry side - no swing.
At "only" 150W, the Model 10 powers these babies like you wouldn't believe. It's all in the switching technology - and musical as all get out.
Now the VRs are 90db, so I'd suggest an audition if you can swing it.
Good luck, and good listening.
Barton
I went to the Rowland Model 10 (after stopping by the BAT VK 6200 x 4 for a bit), and am exquisitely happy. The BAT was on the dry side - no swing.
At "only" 150W, the Model 10 powers these babies like you wouldn't believe. It's all in the switching technology - and musical as all get out.
Now the VRs are 90db, so I'd suggest an audition if you can swing it.
Good luck, and good listening.
Barton