They are all pretty solid.
I went with ASV just because of the huge amount of adjustability but mainly because I thought they looked cool..
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.
however i had to modify them as the plunger for the clutch was depressed and causing clutch slippage.
I always thought Pazzos were a bit expensive, but that might have changed in the 2 years since I was shopping.
Owning CRG products (bar-end mirrors) and having the entire weight of my bike slammed onto them without a scratch sold me on CRG in general. I'd buy their levers if I was doing it over again.