judging by the responses every time this subject comes up, it seems most quilters prefer their quarter-inch feet. i'm not particularly crazy about them. i have tried several different models and keep going back to my favorite all-purpose. i must point out, though, that i'm able to set my needle to a bazillion positions to the left or right of center. when i want a standard or scant quarter inch. i don't switch feet. i change the needle position.
here's a review of the Quilt Wizard. it sounds like a very interesting little gadget. You will probably be glad you ordered it. I gasped at the price until i read the review and found out it's actually one foot with two different adapters. One for quarter inch; the other for in-the-ditch. That maks the price-per-foot about average compared to most I've seen. http://www.quiltersreview.com/article.asp?article=/review/product/020204_a.asp
Brother also makes a pretty neat quarter inch foot. it has a nice wide footprint that helps control the fabric as it feeds over the dogs, but still provides a fairly accurate guide. It's a standard snap-on, so would work on most machines. I'm tempted to buy one just because it's so nifty.
http://www.brother-usa.com/Homesewing/Accessories/accessorydetail.aspx?R3AccessoryID=SA125