I find the Bontrager Race Lite Cage to do pretty much all I ask. I've used 'em on mountain bikes and road bikes and find they perform admirably.
- Secure grip? Check.
- Easy bottle removal and replacement? Check.
- Low gram count? Not as light as the Zipp Speed Weaponry cages on the Giant (25g), but certainly respectably light at 38g.
- Attractive design? Simple look. Almost looks like a human reach out with a hug. At the same time, moderately aggressive with some acute angles.
- Low cost? Check. You can find these on sale for about $10. Much better price point than the $60 Zipps.
I don't see reason to move away from this cage anytime soon.