New to commuter/daily riding myself. Only been riding daily for about 2 months. Recently did a seat upgrade myself and it made a huge difference in my comfort. BHOP is right, its a bit counter-intuitive but a stiffer seat is more comfortable for me.

Bought the WTB Silverado Pro from a LBS for $89. Very pleased with comfort and quality. I bought a white saddle, its synthetic material so cleans easy.

I also purchased a pair of bicycle specific undershorts, this was also a very nice addition for the longer 10mile + rides.