I have a 1980 2.75" Speed Six in .38spl, a 1979 4" heavy barrel Security Six in .357 and a 2013 3" GP100 in 357.
I've had 2x other 4" GP100's but they had crazy $ offered for them at one time or another and I couldn't say no, especially when one guy offered more than a brand new GP100 (back during the panic when you couldn't even get one off gunbroker for a decent price)
I prefer the Security Six line over the GP's. They just feel better to me I guess. I really, really prefer the Speed Six's over the 3" GP100 and the SP101, as it's way easier to carry concealed---which I don't do much these days because I prefer to just open carry wherever I go (that's why I avoid Denver as much as possible--people look at you funny when in the store with an empty holster on your belt)
My dad's job requires that he be armed and he only had an old Stoeger 22lr Luger (not the most reliable pistola if you'd had the pleasure) so I lent my 2.75" Speed Six.
Onto gunbroker to replace that Speed Six, I bid on and won the auction for a very nice 2.75" Speed Six in 357. I was pumped. I contacted the seller and asked how to remit payment. He informed me that revolver had been sold at the show over the weekend. He offered up the 3" GP100 for $100 over the closing auction price. I declined and told him I wanted the Speed Six for what I bid. This went on for a day or two. I didn't want the GP100 for his offer, my final counter offer was the BNIB GP100 for the final bid. He wasn't happy but he completed the transaction saying he took a $50 hit on it.
If anything, I'll probably look for someone with a 5" or 6" GP100 and see if they'd like to trade it for my 3" unit
Anyway, anyone else prefer the Six line over the GP?