Nice to see another XR3 Disc owner! I got mine in mid-April and have had a grin on my face ever since. Those Cosmics look better than the Fulcrum 4s that mine came with and I like your choice of aero bar. I'd love some kind of integrated cockpit setup but they're all eye-waveringly expensive!
They're not too common, I've not seen another one in the wild yet I'm really happy with mine, it's so nice to ride It's in having a new Wheels Mfg. bottom bracket fitted at the moment to match the one in the Roubaix - I don't think the press fit bb86 thing it came with liked being ridden through a series of floods two weeks in a row, despite being dried and cleaned immediately afterwards Although if I'd known about the floods I wouldn't have taken the Bianchi