Mark Levinson model differences : 333 vs 432 vs 532 / H


I’m new to ML and have a chance to buy a 333 for 3k from a friend, fully restored by ML (all caps replaced). ML also has an upgrade program to replace the PCB to essentially turn it into a 336. 

Question is, are the 3xx series - given that they’re 20 years old - in the same class as the 10 yr old 432/532 series, or are 432/532 an upgrade over the 3xx series? I wondering if it makes more sense to buy a newer model rather than a 20 yr old model. I can’t really find a positive answer from the forums so wondering if current owners and experts know the real deal. Also, it seems like the H series is a budget version of the 5xx line? What would be the sonic differences between them, if any?

acrossley
I have a ML 336 failed also and I'm not repairing it . I also own a ML 532 H much more reliable and for short listening I would say about the same sound but if you are  listening for longer the 532 h is much better . I had the 336 for over 20 years  with my ML 380 s . The 380 s I love ! I never had to bring it in  for repair never a problem , beautiful pre amp .Sadly the ML amps back in the mid to late 90s were  terrible . I had a service guy once tell me I should  not play the amp for too long ! What a bucket of bolts !
I own both amps and the 3XX does not come close to 532 h  ,3 xx is just a bad amp .
I have a No.331. Still working...never a problem. I play music EVERY DAY, so you can imagine the hours on the amp. Great amp, great midrange and bass-controll with any speaker.