If I choose 20D body only, what lens?

Absolutely. Mine ended up costing substantially more than that once postage was added, but it's very handy. Since you are interested in landscapes, busyone, it's won't be long before you try a panorama (even with 2 or 3 shots). My first panorama revealled that I have no concept at all of what is horizontal

But Lesmac - let me add my admiration to that you've already received for your portfolio. Very nice indeed.

As a 300D owner, I'm in a similar position as like a twit, I recently tried out the 20D + 17-40L at my local London Camera Exchange - it's almost fatal doing these things...