5d Mark II - What kind of lenses???

Hey

I just bought a New 5d camera... and somebody told me that I might not be able to use my lenses - and that is a truth!

Two of my lenses is useless - Sigma 10 - 20 and sigma 18 - 50.

The canon lens 50 mm and the canon 70-300 seem to be ok.

So I need to do some shopping... so my question to you - what kind of lenses or what do I have to look out to to replace the 2 sigma lenses?

I dont want vignetting. hahah
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Morten
The guy from Norway