If I had the bike building experience that you have I would probably buy more stuff from PBK. I've never built an entire geared bike (I've built up several track bikes) from the ground up. I can replace my own chain, cassettes, chainrings and a few other minor things but I rely on the LBS to do my major upgrades/changes. I'm switching to SRAM Force on my Scott in March and will probably buy everything through RBM just so I can get everything installed. One of these days I'm going to build an entire bike on my own.