For Albrecht style chucks, My experience mirrors cmacclel's, the SPI (Taiwan made) copy beats the Rohm that I've used. I've purchased (for work use) 3 of the SPI Ultra precision and they have all been great. The Rohm isn't as smooth and does not properly "self tighten" like the SPI's (and when it does self tighten, it doesn't loosen easily either). I've used Albrecht as well, and they are very nice, nicer than the SPI, but pricey. I don't know about parts availability, but the SPI's have held up great. Not everything SPI sells is great, so buyer beware.
A good Jacobs ball bearing super chuck is also nice to have, but I use the SPI keyless more because it is so fast.
A good Jacobs ball bearing super chuck is also nice to have, but I use the SPI keyless more because it is so fast.