New or used? I am not up to date on the new models, but I have a couple of favorites from the past that can be found for sale.
The K-22 in two forms, the M18 with 4" barrel and ramped front sight. Foolishly sold mine years ago and now thinking that I need to get it back. Also the M17 with 6" or 8" barrel and target sight. These would be six-shooters, though, and maybe you want more?
I have a Taurus M94 and it holds nine rounds. But it is a fairly small gun.
Want a realy hefty .22 revolver? The Colt Officer's Model/Match with a 6" heavy barrel. Old world craftsmanship and exquisite accuracy. Talk about bulk, this one is a real hand full. For something a little more modern the Trooper MK III was made in .22 with 4", 6" and 8" barrels.
Anyway, these are my favorites.