I liked underwire better... Better shape and the felt like they gave more support. If they dig in you may just be wearing the wrong size, so anything you get, be totally sure it's the right cup size. People often get too small a cup and too big an inch measurement. I was totally fem for a long time so I experimented with tons of types of bras and vastly preffered them underwired and lined, demi cup style, with a racerback or convertible-strap if possible so the straps wouldn't fall down. Read up on sizing and fit, try sites for women's magazines like O or Cosmo maybe.
If you have a GAP Body in your town's mall, go there, they often have really awesome stuff on clearance (I would get $40 bras for $15 all the time) and have more variety and are in general a lot nicer-looking than Victoria's Secret, and better fitting than the stuff in deparment sotres.