Well, I chose several ASUS components for my new PC build, and I got a free Gladius mouse with the motherboard purchase (I hadn't been planning to buy a mouse before this). Honestly, it's fantastic and I really enjoy the quality. It's a solid build, good weight, nice components, great texture to my hands. It's right at the upper end of your spectrum, but I can recommend it.

If you want to step down a bit, you might consider their Sica. Not as high-end, but ASUS usually offers good quality for price. Not quite as ergonomically contoured, and missing a couple buttons, but the build quality should still be there.