I have a small store with some items which have many variables (T-shirts with attributes for colour, sizing etc).

I don't want to list each colour + size separately, I'd rather have a grid- or dropdown-style selection for the customer on the item's store page, which takes a feed from the item attributes as input in the admin panel.

I've seen a couple of addons that I believe could provide this functionality, but I've used neither. Please could I get some recommendations as to the best one to choose?

Cheers
Chris