If you want to stay with Ayre, sensible given your other gear. I would reach to their newer products. The V-5 is a clear step up from the V-3. The K5xe is a great pre but, mated to a V-3, it might not be any better than the AX7e integrated which you might find for not much more than a V-3. The V-3 is fine in its own right but is bettered by the later models.
BTW, I highly recommend upgrading your QB-9 to the Twenty version.
BTW, I highly recommend upgrading your QB-9 to the Twenty version.