Hummmm..... Quad makes both SS and tube gear, so the question is quite ill- defined. The SS Quad gear is very British with a laid back presentation, not particularly 3- dimensional and oft times rolled off top end. Some would say polite. The tube gear is quite different from that giving a more lively presentation. I'm a fan of the Quad tube, not so much the SS product.
You've given no direction as to ancillary pieces, why you wish to change/upgrade or musical preferences. Try again.
You've given no direction as to ancillary pieces, why you wish to change/upgrade or musical preferences. Try again.