OK, I know that everyone is expecting it, so here goes...
My first quad line kite was the Rev 1.5 and I never regretted it. I think I paid about $225 retail for the kite, bag, lines, and handles. As you can tell from MY avatar, I'm a Rev fan! I have a variety of them, and appreciate their predictability, solid construction, control, etc. That being said, you'd probably like the Spirit also. I owned one for a while, but didn't connect with it.
Glad you're looking at quads. If you're into control, you'll enjoy it. (OK duallies -- time to shoot down that remark!!!)
Doug