Baranyi,
Your comments make sense. I can relate, as I was an owner of the 4.5s with BAT vk60 & vk5i a few years ago. Now I use a Berning. It is certainly better than the BAT to my ears, but it should be at double the price. (Not to mention the wait for new & lack of used available!).
My very first tube amp was a VTL ST-80, certainly not as nice as the 125, so take this w/grain of salt, but to me the VTL doesn't give you the transparency of the BAT nor the Berning. Details will lack, relatively speaking.
The BAT combo could be the smart bet for your situation; you could use it for a year or two, order a Berning and/or Supratek whenever finanaces allow; use the BAT while you wait for them, and them sell the BATs at nominal depreciation. You could do a lot worse! Keep us posted...
Cheers, Spencer