I bought a 4BST new in 2000 and had it for 19 trouble free years. In 2019 I traded it in on a 4B3 which sounds noticeably better. I’m not sure how much you’d have to spend on your turntable upgrades to equal that. Or how much to update your 4B, but it will still be a 4B. My 2¢, I think you should go with a new 4B3.
Keep my 1996 bryston 4B or get a new 4B
I have a Bryston 4B I bought new in 1996 and it still works wonderfully. I been thinking of buying a brand new Bryston 4B dose it pay to spend 8500 on one and will I gain better sound then I an currently getting. I have upgraded the rest of my system in the last 2 years from a pair of dynaudio special forty speakers a rel s510 sub a rouge rp7 preamp a pro ject tubebox ds3b phono preamp and a new cocktail audio x45 streamer along with my linn turntabel. And all new pure silver audio cabels. Would I gain anything in the sound quality by replacing my amp for a new current model or would I do better to spend the money to up grade and improve my lp12 turntabel. Thank-you Michael.