You could have gone for the SP with three-inch barrel and a normal spur hammer. No need to step up to the GP with three-inch bbl.
I got the SP-101 with bbl. a fraction over three inches and think I got considerably better velocity, sight radius, and the barrel that helps to reduce muzzle flip on recoil.
In published tests, the Winchester 145 grain .357 Silvertip gives about 1200 FPS from a three-inch barrel. It's a grimly effective load. That comment is based on morgue results from the Medical Examiner's office, not on Internet gossip.[/QUOTE
Hey Tex, I'd rather have the bobbed hammer and shorter barrel for no snag draw and less barrel poking my gut when IWB appendix carrying. Around these parts

, you can get arrested if someone spots your gun so it's IWB for me. The slightly better velocity and sight radius I'll give up for slightly more comfortable IWB carry. At typical defensive distances and a good defensive load I feel it's more than adequate. No doubt the 3" SP is also a fine carry gun. I found my six month old SP for $450 OTD and it suits me.