kbeanThis kit does have a Matias switch option, but I don't think Tai-Hao makes ErgoDox sets. I have only seen them in standard sets. They also don't appear to make Alps compatible sets, so if you do go for Matias switches you're out of luck.
Signature Plastics/PimpMyKeyboard is the only cap maker that makes ErgoDox sets that I'm aware of, but I don't think they make Alps compatible caps. Almost nobody makes Alps caps, so if you go that route, you'll either have to cannibalize another board for the caps or stick with the blank set that comes in the kit.