I am in the same situation, but I didn't add one, for the moment...
It seems that the next step is unavoidable, as I already own 2 Seamasters 300, and I want to end my Omega Collection with a Vintage Railmaster, and... The Speed!
I didn't already decide what Speed I will hunt, but I will have one!
Congrats, yours is superb.
I wouldn't change the bezel, unless you find one authentic NOS, or in great condition.
Enjoy!
Best,
Nicolas