I do like my Etha, but if I had to choose in your position I'd go for the Etek 3. I guess what it comes down too, is if you are coming from using a poppet ego you might still prefer a poppet etek 3 over a (spool/poppet - don't start..lol) etha.
Im with Ricki on this. I have had an etha but I prefered the shot of the Etek. The etha had a fair bit of vibration from the spring when you shot which I wasnt too fussed on.