Thank you for the reply Keith. I had first read that the original P22's were awful guns...I have actually persuaded people out of buying this gun...but after doing a bit of reading, it seems like the newer models are doing pretty well.
I had my mind completely made up. I was going to get the Single Six tomorrow...shorter barrel, stainless, whole bit. But I will not be happy with 3+ inch groups at 25 yards..and it seems like about half the guys on this forum and others are averaging those groups, or worse.
The P22 will shoot about the same, at least from what I've read..no personal experience. Even if it does a little worse the look and weight of the gun makes up for it, to me at least.
I read a review by gunblast on the Mark III hunter...that thing did really well. I don't care for the styling of the Mark's. Both the P22 and the Mark have semi-akward safeties for me to reach.
From what I'm seeing with my limited research:
For accuracy, I'd buy the Mark III. From my perspective..styling would be the P22..as it looks like with accuracy they're on similar pages, with the Single Six being slightly better. I'd take your Single Six...I'm just worried I'm going to buy one and have it be one of the mediocre ones....The Walthers all seem to shoot about the same...not as great as the good Single Sixes, but they're reliable.