Last year, you gave your partner a Roomba for Christmas. This year, ask him/her for the iRobot Dirt Dog, the masculine version that is designed for basements, garages, and shop floors. It can pick up nuts, bolts, wood chips, and probably any other crud that you have lying around your workshop that the Roomba vacuum can’t get. The Dirt Dog features an over-sized dust bin and counter-rotating brushes that work at high speed. There is a 1-year limited warranty and 30 day risk-free trial. If that isn’t macho enough, you also get a 6 month subscription to This Old House Magazine (5 issues, a $10 value) when you order at iRobot for $129.99.