I'd take Vanek - he is a pure scorer.
I second that! Also Vanek is a very good net front presence (not as tenacious as Holmstrom but with good hands and patience too), he is very good on the power play and he can kill penalties as well. He's put up good numbers on an average team and he is very durable. I'd take him over Clarkson anyday, not just because he's a fellow Austrian.