TL;DR: can I get a comfort saddle for my road bike?

I just purchased a SS cyclocross bike (motobecane fantomcross uno) from BD for commuting/touring/cardio. The saddle is KILLING me. I couldn't sleep last night because of groin pain. My LBS's only fitting advice was "make sure the saddle is lined up with your tailbone when you're straddling the bike" (I'm going to look for better advice).

I need to order a new saddle, and I've been reading good things about Specialized's body geometry. So, here I am, choosing between 3.

Targa
Milano
Sonoma Sport

I'd obviously prefer one of the thicker, cushier ones, but I'm worried that it would be a bad idea with my frame's more aggressive geometry compared to most commuters and the relatively high cadence I have to set as a SS. Also, my stem is a little too long for me, and it might be a while before I feel proactive enough to shell out for a more upright position.

Should I stick to a road saddle?