We have several credit cards but we've always preferred cash back. Now we've decided we'd like to accumulate miles instead. We currently have a Capitol One Platinum MasterCard and are considering switching that to one of the Capitol One Venture cards, either the no fee 1.25/mile per dollar one or the $59 fee 2 mile/dollar one. Are there other options that could be better for us?

Some info about how we'd use it: We currently charge 60K - 70K per year, pay it off every month, and have excellent credit. Travel is out of Detroit, so usually on Delta, and we take one European trip most years and 1 - 2 domestic flights. No business travel at all.

I'd appreciate any suggestions, thanks!