First lens for first DLSR? (few options)

I'm probably going to end up buying the 40D body, since the price differences between that and 450D is less than 200 euros. 400D is of course an option too, if I can find just the body.

For the lens, these are my options:

Sigma 18-50/2.8 EX DC MACRO
Tamron 17-50/2.8 SP XR LD Di-II

Canon EF-S 17-85/4-5.6 IS USM (the kit lens)
Sigma 17-70/2.8-4.5 DC MACRO
Tamron equivalent?


What would be the best and most useful first lens for someone just getting into DSLRs?

Personally I'd go a 17-50-odd f/2.8 - I started out with the 17-85 IS USM and was never really happy with it. Having f/2.8 gives you much more versatility.

A good everyday lens, as opposed to a 'specialty lens' such as an ultrawide, since you'll get more use out of it. I'd recommend the Tamron 17-50/2.8...its as good as their 28-75/2.8, and you're pretty much covered from a typical wide angle to a medium focal length. It also has a constant minumum aperture (unlike the Sigma 17-70, which has a variable aperture. Not familiar with the Sigma 18-50, so really say much pro/con about it. Lots of folks here use the Tamron 17-50, and it gets excellent reviews.