Patient my grasshopper..patient! It will be all worthy. I have tried so many brands and I can tell you Bryston is on my top list. Right now I have the old 3B and the newest baby 2BLP-PRO . The old 3B I did an upgrade of all electrolytic caps and two resistors that were a little cooked, I used Mundorf caps for power supply and same caps that Bryston uses for the rest. The resistors I used wire wound 1% and increased wattage by 50%. An upgrade is always welcome. I heard the 4B st and it is a monster, it sounds beautiful and of course as all Bryston it is made to last. Good choice 👍