@cantorgale This is a tough one. I doubt that Musical Concepts can bring your Hafler up to the performance of any of the Backert Labs offerings but if you send the Hafler back to MC I would have them go all the way with the mod. including the outboard power supply That way you'll know you have left no stone unturned.
You may be right about the future market for a modded component as I've read that on A'Gon before from others. Personally I don't get it. If I were in the market for used gear I wouldn't have any bias against modified gear. As the buyer you would know that you are getting an optimized design and will pay a fraction of what the owner who modified the piece invested in it.
It might be helpful to call and talk to John Hillig to hear what he says about how close in overall sonic quality he can bring your Hafler to some of the better new offerings on the market today.
All the best!
You may be right about the future market for a modded component as I've read that on A'Gon before from others. Personally I don't get it. If I were in the market for used gear I wouldn't have any bias against modified gear. As the buyer you would know that you are getting an optimized design and will pay a fraction of what the owner who modified the piece invested in it.
It might be helpful to call and talk to John Hillig to hear what he says about how close in overall sonic quality he can bring your Hafler to some of the better new offerings on the market today.
All the best!