Yes I think you made the right choice. That OP is unique with such a rich and mesmerizing dial. The size is also perfect on your wrist. The Explorer is a classic for a reason but I would probably get bored of the plain black dial after a while, so if you have had some time with it and enjoyed it, moving to that unique and beautiful OP is a great idea.
I prefer the look of the Bulova, and dig the independent hour setting, but I agree with @foghorn that the second hand and GMT hand are easy to confuse. However I'd still probably go for the Bulova. The design is much more my style than the SRPD (I had a 5KX but sold it).
This is a great point. My nicest watch is an Alpinist, and I have been wearing it almost every day since I got it a year ago. But J do get bored of it and start wondering how i can top it. But I've just been away for a week and worn a cheaper watch throughout, so I'm sure seeing the alpinist will feel very fresh
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