Hi,
For 1/4" high-quality router bits I use Whiteside router bits, winner of the fine woodworking magazine router bit shootout. The best price is from LibraWood
http://librawood.safeshopper.com/
For high-precision 1/8" shank micro tools I use PreciseCut tools.
http://www.precisecut.com.
PreciseCut also has a add-on 1/4" to 1/8" collet that has super low runout for VERY precise CNC applications.