I have to agree with Samuse on liking the SA frame (no experience with Wilson) than say a Colt or even my DW frame. I have fairly large hands and I like the beefier feel of the SA/Baer style frames.
I don't care for 20lpi that SA uses, but their machine high cut 25lpi is damn near perfect. DW 25lpi is nice as well, but doesn't seem as sharp as SA which I don't mind.
Baer's 30 lpi is good, not as good as SA or DW 25lpi, but I haven't had it slip from my hands so far. I would prefer Baer to start using 25lpi, but Uncle Les doesn't like change, it's his way or no way.
Other than Baer's, I have no experience with hand checkering and with my limited knowledge, I doubt I could truly see the imperfections unless someone pointed them out to me.
Edit: This was sacrificed, wish it wasn't, but this was about the best feeling checkering I've ever felt.