You could always go with Hero Sytem (5th ed. rev.)...Our table top groups love the system as, while it is a bit more work up front, the system is infinitely flexible and very easy to use (once you're past character creation, at least). Its about the closest that I've found to a free form game with solid rules, if that makes sense? We've run sci-fi future, high fantasy, modern, super hero and urban fantasy games with the base rules.
The basic rules (known as the sidekick) are available through their site (https://www.herogames.com/viewItem.htm?itemID=192011
) or through drivethruRPG (http://rpg.drivethrustuff.com/product_info.php?products_id=19009&it=1
). The Sidekick book covers the basics of character creation and powers. The full book has more examples, more complicated powers and basic information on genres. The full system is much more comprehensive ^_^ Also, the game shop thought that it was a college text >.<
Looking over the Cthulutech stuff, I really like the art! The flavor of the universe is interesting, and the style of characters sounds intriguing...I would have to say that I'm very interested, though er...they certainly know what they want for it. A hard copy of the Cthulhutech book is $50 for 288 pages, which is the same as the main book for Hero system, weighing in around 600 pages. If the art in the book is anything like it is on the site...hrmmmm...