If you love to use dumbbells while strength training, you're going to love using resistance bands. Not only can you do the same exercises, but you'll work your muscles differently because you can move the band in every direction.
If you're in the market for some bands, check out this GoFit Ultimate ProGym. It comes with three different bands with 5-, 10-, and 15-pound tension, two ankle straps, a door anchor, and two handles. The best part is that it also comes with a DVD, so you can learn how to use all this great stuff to strengthen and tone every part of your body. I love that it comes with a little carrying bag, so you can bring it on vacation with you. OK, well maybe you won't, but at least you have the option.