Best bike for distance, best bike for speed
I have pretty similar cycling needs as you. I love to race, but still commute over 250km per week in bad weather, so I needed a durable, sporty bike, on a budget. 
After doing a LOT of research, I bought a Verenti Defense WR2.1 Sora 2015. 

Hope this answer helps, I have done over 4000km in 4 months on this bike in terrible weather (Ireland) and have also mounted rear and front panniers. Therefore, in my opinion, this is defiantly a sporty bike as well as a workhorse. 

P.S. Comes with mudguards, rear rack mounts, 25mm tires (only had 2 punctures so far), etc.