A sleeper bike to check out is the Diamondback Haanjo Carbon series. I've beat the shit out of a 2017 Carbon Trail, I think over 13k miles on it, with regular weighted commute loads on the frame, its holding strong. I found the parts spec to be a notch higher than competitive offerings at the time. Potential downside... doesnt have as much tire clearance as the newer geometries. If you can stretch your budget to $3k I see stock at diamondback.com for the highest end model (ultegra, decent wheels, etc). They can probably be found used as well.