I have a Velobuild VBR-099 with a Velobuild wheel set. My bike weighs 8.1kg but bear in mind it’s a somewhat heavy build due to various choices I made. e.g. 11-36 cassette, long cage derailleur, longer chain, 32c tubeless tyres, 160mm rotors (which require an adaptor bracket for the brake caliper on this frame), extra padding under the bar tape etc.
My setup is 105 mechanical (other than the Ultegra crankset). Routing the cables was quite tricky but once done it’s been absolutely trouble free. I love this bike and I’d by another one any day of the week! If I recall correctly, it was delivered to the UK in about a week from ordering which was a pleasant surprise. Some people find the bars a little too flexy but for me they're great and they absorb road vibrations nicely. If you're doing a lot of hard sprints out of the saddle, I guess you might not like them so much.