There are a couple others. Little Tawainese companies like Power Color.
The Hercules 3D Prophet 4500 is the one you want to buy.
As for a Kyro being recommended over a GF2MX...well it's definately faster. I don't know what the prices are like for you though.
For me the Kyro2 64MB was ~$30 canadian ($20US) more than a 32MB GF2MX, and about $40 canadian cheaper than a 64MB GF2MX 400. The choice was not hard for me.
But if an MX is significantly cheaper it may be a better investment.
I like to keep my video card purchases around $200-220 canadian. The Kyro2 is the best I could get for that price, so I got it.