If you're ready for some serious free weight training — and ready to save some space — you should check out the new Bowflex SelectTech 1090 Dumbbells ($599). These futuristic dumbbells replace 17 pairs of normal ones, allowing you to quickly change your resistance from 10 lbs to 90 lbs with just the turn of a dial. A handy Bowflex SelectTech workout DVD is also included. We've been beefcaking it up with these bad boys for the last two weeks, and we're definitely not disappointed. The SelectTech 2-in-1 Stand ($149) and SelectTech 5.1 Series Bench ($229) are equally as awesome.