I want to build myself a drop handle bar touring setup bike.
GRX RX400 seems like a good budget option. Bikeradar mentioned this groupset to be on same level as Tiagra. Gearing range on this groupset is as per my need. 11-36 in back and 46-30 in front.
Reason why I want to use Tiagra shifters and not GRX shifters (ST-RX400) is because GRX shifters are for hydraulic disc brakes only>. I have never installed or operated hydraulic disc brakes on STI shifters and I'm not sure how complicated the process of resizing the hose will be, so want to stick with ST-4700 rim brake compatible STI shifters.