I have the regular shapecut ruler and love it. The slots are a half inch apart but there is a line a 1/4 inch from the first cut line so you can cut any sizes that are a multiple of 1/4 inch. It also has lines printed on it to cut different shapes instead of just strips though I've not done that.

Any one you choose would be great I'd say. Good luck. (Oh, while I have seen them at quilt shops I got mine at Walmart, so it should not be hard to find one.)