bibs for long-torsoed gal? and good non-cycling tights

[cinnamon_toast]

I am thinking about buying my first pair of bibs. I am tired of shorts slipping down my waist. Having never worn a pair, I am wondering if they work for someone with my body type? I am 5'8" and have very slender legs and a long torso. Will bibs that fit my torso be too loose in the leg? I normally wear a size small.

Also wondering if anyone has a rec for a non-cycling tight I can layer over bike shorts? Just a heavy lycra would be great, no extra insulation (I'm in central Texas ).