I had a pair of DNA-1 monoblocks driving Vandersteen 3A Sigs, gave those up for a pair of DNA-1 Dlx Golds (non momoblocked) that are vertically driving the Vandy's now and they are so much better than the monoblocks, I put the monoblocks back in a couple of weeks back and the bass was so over driven they didn't last the weekend (too much power). I also have a McCormack Micro Line Drive and a Micro Phono Drive that I had upgraded to Gold and they are not the same peaces of equipment they were before the upgrade, I know because I have the stock versions of both in my computer room. A great example of the improvements that I can give is on Dave Brubecks "Time Out", while Dave is playing the piano, as the hammer is striking the strings, with the stock equipment it sounds as if there is a layers of felt on the hammers and with each upgrade a layer of that felt is removed, making the notes sound more real and less like a reproduction. The funny part is without hearing this I didn't realize I was missing it. When doing a comparison I could not believe the difference. I tried the MLD in place of my TLC-1 Dlx and everything just became that much clearer, greater transparency, with more depth along with quieter, blacker back grounds, wow I was in heaven. The improvement were so great I've scheduled my TLC for the Full Monty with the Carbon wiring. Yes the bad part is you can only get back about half of your investment on the upgrades but if you have plans to sell your equipment down the road then you would be better off waiting till a modified unit comes up online and do a comparison then. By the way many Agoner's here recommend a tube preamp with the McCormack's and with the power demands that your Von Schweikert's have you just might wind up with an outstanding combination.