The Infamous Kitchenaid Attachment: www.amazon.com/gp/product/B0002IES80/ref=as_li_tf_tl?ie=UTF8&tag=brookbrain-20&linkCode=as2&camp=217145&creative=399377&creativeASIN=B0002IES80
If you already own a Kitchenaid stand mixer and don't want to add another giant appliance to your countertop, I'd definitely recommend this attachment. It's what I use at home, and while it's not the best thing ever (watch out for overflowing ice cream!), it'll freeze your ice cream just fine. Plus it's always fun to make your Kitchenaid more of a multitasker.