I would try to find somewhere that might let you try one out first. I bought a Galco Miami Classic a few years ago for my Sig 229. It's easily the coolest looking way to carry a gun... but after wearing it for a few days I just couldn't get over how uncomfortable it was.
You wouldn't think that a shoulder holster would put much stress on your back and shoulders... but it does. I still have it, but I rarely use it. Just not all that I thought it would be