I find the stock grips on the Ruger Super Blackhawk barely big enough, so I would like to get some bigger wood stocks. I looked at Hogue, but theirs were all finger grooved that I saw in the catalog. Are they comfortable enough, or does someone make smooth, oversized grips for the SBH?

FWIW, I love my Hogue finger grooved grips, but your hand may be a different size. I definitely prefer the finger grooves in the larger calibers for more control of recoil. My wife's .44 has slick Pachmayr's (which fit her hands fine) and I always feel like it's gonna slip out of my hands with hotter loads.

I would not recommend finger groove grips for heavy loads in the SBH, but if you not using heavy loads, have at it. I know you weren't asking for my advice!
Peter.

What Daniel said, with the exception of the Pachmayrs. I use the standard Ruger grips on my Super Redhawk, but I use Hogue finger groove grips on my carry gun, a tuned Colt Commander. I really like them. The gun fits me like a glove and I have large hands, so it really depends on your hand size.

I also use a Hogue grip on my .38 snubby, a Smith 649. I bought three different grips before I found one that I liked.