unless you are going to carry in your pocket, keep the hammer spur, now after saying that, most of my revolvers have a 1/2 hammer spur. I grip revolvers really high to aid in recoil recovery and faster repeat shots, most factory hammers will hit the web of my hand and throw my trigger squeeze off, so I have them cut back aways so this doesn't happen. But the hammer spur is nice to have even though I rarely use it, it keeps the gun in the holster, and lets you shoot single action for long or very precise shooting.
Joe