Great line up, @BKaelin!
I gotta say that I LOVE my Houdini. It not only looks great, but plays really uniquely. Different than anything I see on your list.
The game haunts me and makes me come back for more. The magnet system is really fun. The modes haven't gotten old at all. Inverted Straight Jacket mode is SO clever. Great fun. And, its really well made and supported by American Pinball.
(pssst... this is RBerryessa )