Hi Antoine
Thanks for your reply. In answer to your first question, yes I am contemplating returning my VR-4 Gen.III's to VSA for the upgrade to Mk.3 status. As far as selling mine and buying a used pair of Mk.3's or VR-5 SE's, I don't know how the "numbers" ($) would work out. I don't know what the re-sale value of my Gen.III's would be nor do I know what the going prices are on used Mk.3's or VR-5 SE's. I don't think that the money I can get for selling my speakers, added to what the upgrade costs from VSA would have cost me would be enough to buy a used pair of Mk.3's and I certainly doubt it would come close to the cost of used VR-5 SE's. The other thing to consider is warranty... getting my Gen.III's upgraded to Mk.3's would give me a "brand new" warranty from VSA and a lot of peace of mind.
Considering that VSA has told me that they have done a lot of these Gen.III to Mk.3 upgrades, I find it hard to believe that I haven't found anyone on this forum to comment about it first-hand. If there
are any VSA owners that have done this upgrade, they certainly haven't taken the time to reply here on AC and tell me if it was worth doing.

I guess, it's just a matter of me getting up enough "guts" to call Albert and tell him that I'm ready to do it on "blind faith".

Again... if anybody out there has done this upgrade, please tell me of your experiences with it.
Thanks!
SN