Hi Say811, I currently own a melos ma-333 and find it moderately superior to my previous cj pv-7 preamp. I also don't think you can go wrong with a BAT product. I friend of mine has a gfp-750 and a pv-7 preamp and the cj wins hands down. the adcom is very clinical and detailed but, far less musical. I had also owned a pair of ads L-710's. Although this was/is a decent speaker, I think you will find FAR greater results in a speaker upgrade.
Hope this helps,
Paul
Hope this helps,
Paul