I'm not sure there is such a thing, a best sound for blues. Snare sounds in blues vary wildly, it's more of what sound do YOU prefer. I play predominantly blues and I use a fairly tight drum tuning w/ tight wires. Not your traditional sound, but then again we aren't imitating old timey blues either. Traditional blues recorded in the 40's, 50's 60's...the drum sound is low tech and kinda crappy IMO. So you don't really want to replicate that, at least I don't. Any snare wire will do really.