I've owned an ASP carry package (the double magnetic mag holder was pretty cool) as well as Model 39 and Model 59 Full House DEVELs. The Guttersnipe was the reason I sold my ASP - It was very difficult to become proficient with. Occasionally you will find an ASP with conventional sights. I was told by a retired gov't agent that the some agencies that utilized the ASP did not like the Guttersnipe and requested conventional sights. If I'm lucky enough to find one of the modified ASPs, I'll hold on to it.
I kept the DEVELs and qualify with them twice a year. The Model 59 is my favorite.
ASP also made a cool Ruger .44 Spl.

My vote is DEVEL hands down.