I've a 33/303 in my "bedroom"  / '70s system. It was the first "real " hi-fi I had. I regret selling the ESL 57s I used with it but don't really have room for them anymore.

It's worth doing the net audio power board upgrade on the 303 - it makes a big difference and involves: taking off the baseplate, unclipping the board, desoldering 4 wires, soldering 4 wires from the new board before clipping it in place and replacing the cover. Even my (very) basic skills were not challenged.

I must admit that I really like listening to the older stuff - things haven't moved on the orders of magnitude we're led to believe.