I heard not so great things about the bulky 35L and with 4 stops IS the new 35 f/2 the 35L has little to offer (or am i wrong)
Hmm. There is a very good reason the 35L is in the Canon "Holy Trinity" (35L, 85L, 135L). Perhaps a good strategy will be to wait for the Canon 35 f/2 IS to actually start shipping, then pick up a recent vintage used 35L off eBay when used prices drop (perhaps).
As with all things Sigma, I strongly recommend waiting to see if the Sigma 35 f/1.4 turns out to be reliable with accurate AF before jumping in.
As far as Canon 35 f/2 IS, it really should have been $200 less, and I would try to pick it up with some sort of rebate/sale down the line, if you so choose.