I'll be planting a clematis along the arch over my garden gate this year as well. I'd also like to plant a honeysuckle there....I LOVE the smell of honeysuckle. Both are vines that need very little care and thrive well in the acid soils here at my place.
I've also found another vine we really like and that is very cold hardy lately, though they don't vine as quickly or as high...found it at the local nursery last year but for the life of me I can't remember the name of it. Deeply red, velvety textured trumpet like flowers, waxy leaves, bloomed like crazy and put out runner vines that climbed but not many of those so the plant stays more shrub like. They also had this vine in pink but the red was so deep and entrancing that we liked it best.
I'd like to plant some of those inside my garden fence so they can slowly vine upward and bloom those scarlet blossoms from early spring until past first frost.