I've also been thinking about transitioning out of jeans into something else (I'd like something slightly more pulled together looking.) It's very hard to find pants that aren't super casual or super dressy. Chinos don't usually look good on me - I need a sleeker leg - and I prefer black.
I loved, loved, loved the BR Sloan textured pants that Angie put in the store, and they were almost perfect - except they were just a little too tight around the crotch. I have this particular problem a lot, because I have big hips and thighs. But if you don't have problems with pants fit, I would highly recommend them. They come in navy and grey and a lighter color, but I only tried the black. They're not too "office looking," and are boot cut. Sigh. Maybe if I lose a little weight they'll fit better, but I need something now!
http://bananarepublic.gap.com/.....pid=830895
If you like straight legs, I would also recommend the BR Martin skinny fit pants (similar to the GAP pants Isabel recommended.)
http://bananarepublic.gap.com/.....=760825002
I've also transitioned into much nicer jeans - premium denim with dark wash - and that's made a big difference when I do wear jeans.