As far as graphics goes, you may have better luck with the cirrus driver, or with the VMware vga driver (vmvga or svga, depending on your qemu version). The VMware VGA driver ships with most current Xorg packages. Some of the devs run ESX, so someone may have coded in support for it's video drivers.
Hope that helps!
What kvm reports as its VGA "chipset" under lspci changes, and the fbdev driver works on everything. As a catch all "I don't know what the hell this is" I use fbdev. Hacking around the detection logic to try and get a slightly better result in a vm is not recommended nor supported.