I have a few different brands, but I find I like the EZ Quilt ones the best. They have a great variety and they are readily available at Walmart for a decent price. I use the EZ Angle, the Tri-Recs, EZ Rule Junior and couple others I can't think of right off. They don't have lot of extra marking to confuse my aging eyes (and brain LOL). I use Invisigrip on the backs of all my rulers. Here's a link to the website with all their products. It also has tutorials and free patterns. Hope you find a brand you like!
http://simplicity.com/c-374-rulers-templates.aspx