Old thread, I know... I enjoyed reading your responses, so I thought I'd chip in.
Chris (Fossil) was speaking about having a horn that compliments your playing, and I feel that is arguably the most important aspect of a horn, whether or not it's your holy grail. That being said, I do really enjoy the wider throats of the Bach 50s. I've never been lucky enough to play a 50 made in NY/MV, but I have played my teacher's MV 42B, and I loved every bit of it. I'd love to get my hands on an original NY/MV 50B, have a tech fab up a Marston birdsnest valve, and just revel in the Peebles bell while being able to keep up with all the low Bs that come my way.
I'm in the process of securing an original MV 45B, and that may be the closest I ever get to my dream 50 (I have a feeling the prices are only going to go further out of my price range, and the unmodified ones are going to become more and more collectible). If I like it, I'll have someone give it the Kleinhammer Marston valve treatment, and if I don't, I'll sell it and probably regret it for the rest of my life.
For now, I'll stick with my 90s 50A3 that was built in baroque tuning for whatever reason
