Ellen, I agree, a more extended-range zoom would be great, and is actually a realistic goal, as opposed to my dream lens. How about a 24-120 f/4, or even a 24-110 f/3.5 with OS? Sigma could probably sell that for around $1k. If it was very good optically, they could even start to cut seriously into Nikon and Canon market share.
sdsr, do you own the Sigma 85 f/1.4? I want to rent that one at some point. I bought the Rokinon, and I like it a lot...but manual-only focus is a drag at times. Also not sure it is completely f/1.4, it seems a tad darker than that. I've owned several sigma products, even a camera...currently have the 17-50 f/2.8 OS, and love it. The only time I've been published, was using the older 17-70. They both have very rich color slightly on the warm side, which to me is best.
I agree, I think you're saying the Canon 24-105 is a good deal when it's a kit lens. If the price on that combo comes down any more, that's when I would buy it. I still want to see what used 6D's start selling for, though...not because I want to buy used, but I want to see how well it holds its value. If it's as low as $1150 or so, I think the 5D3 will hold its value better...percentage-wise. No doubt the first used 6D's will be very high, though...so will be hard to tell.
For me, the target for the kit lens combo would be $2200, or even $2100...if they really want to have a "sale"...or a huge rebate. Probably won't happen this year though. Depends what Nikon does next, I guess.