well one thing i noticed about the new sigma lenses, including the 50mm f1.4, is that its sharp out of the box, no calibration needed. i dunno why the canon camp always have problems with sigma lens but us sony doesnt.
i just got the HSM one a few hours ago. i never used the older version before, but having used the CZ version a few times, i can say, the sigma can give the CZ a good run for its money. its definitely not as contrasty and sharp as the CZ, but its definitely a winner. for 1.4k this lens is really a real bang for buck. i wouldnt call this a poor man's CZ. more like a baby CZ. lol.
Congratulations! Heh. Well I guess it must be a BIG baby - 82mm front filter!
Forgot to mention that this could be a factor for some. I used to buy 77mm filters because I though these would be as big as I'd be using, so spent a small fortune on CP-L, ND400 and even IR. Now I can't use them on this lens anymore, which is quite a pain.