Sorry, I did re-read your post about the age of the speakers, then I revised my post and deleted the question.
My tube amp is able to easily drive the VR4 Gen III HSE speakers with lots of room to spare on the volume pot. Although your room is almost twice as big as mine. If you're looking to fill your room with heavy metal music at "live" volume, then you may require some more power. I don't know. I still maintain that your imaging issues are a product of speaker placement and not amplification quantity or quality.
Based on your room size, it would seem like about 6 feet from the back wall would be a good starting point. Do your speakers and listening chair form an equilateral triangle? This is key in my experience. How about toe-in? Adjustments of just half an inch make a significant impact. Start by pointing the speakers directly at the listening chair and slowly rotate them out a few degrees. You should find a point at which the image locks in and floats just as you describe. Sorry to hit on the placement issue so hard, but I don't believe your amplification is the problem. Sure, a better and more powerful amp will help the dynamics, but it won't help imaging in my opinion. Certainly to the degree you are describing. Member "Jtinn" sells Von Schweikert and has helped me in the past with set-up issues. He'd be a good resource. You can do a member search and send him an e-mail.
Good luck. Even though it's hard to resist, try to lock in your speaker and listening positions before you start dropping coin on new electronics.
My tube amp is able to easily drive the VR4 Gen III HSE speakers with lots of room to spare on the volume pot. Although your room is almost twice as big as mine. If you're looking to fill your room with heavy metal music at "live" volume, then you may require some more power. I don't know. I still maintain that your imaging issues are a product of speaker placement and not amplification quantity or quality.
Based on your room size, it would seem like about 6 feet from the back wall would be a good starting point. Do your speakers and listening chair form an equilateral triangle? This is key in my experience. How about toe-in? Adjustments of just half an inch make a significant impact. Start by pointing the speakers directly at the listening chair and slowly rotate them out a few degrees. You should find a point at which the image locks in and floats just as you describe. Sorry to hit on the placement issue so hard, but I don't believe your amplification is the problem. Sure, a better and more powerful amp will help the dynamics, but it won't help imaging in my opinion. Certainly to the degree you are describing. Member "Jtinn" sells Von Schweikert and has helped me in the past with set-up issues. He'd be a good resource. You can do a member search and send him an e-mail.
Good luck. Even though it's hard to resist, try to lock in your speaker and listening positions before you start dropping coin on new electronics.

