I looked into the Aspide as well, but ended up getting a San Marco Rever upon recommendation from my LBS - it's awesome!
My first 5 hour ride on it left me cursing it to bits, but i got over that impression after a few rides. I've had it now for 3 months and think it's a fantastic saddle and by far the best i've used. Very light as well. I think probikekit.com has some good deals on them, but they're still pricy
They say the Aspide has the gel up front that's supposed to help with TT/triathlon positioning. I've use the Rever in TT's and haven;t had any issues with it.
I have ridden the San Marco Composite, and it was too skinny and it was more like a bar that jammed up your rear. On the other hand, I used to have a selle italia flite, but switched to the SLR Carbon (88 g on my scale) and it is 100% more comfortable than the flite i had. it just "fits". Hope this helps.....might consider this saddle as well. Ive ridden it on 4 and 5 hr rides before and never felt uncomfortable or sore afterwards, as the flite i did feel uncomfortable sometimes.
Believe it all depends on what width saddle you need. The regular SSM Aspide was too narrow for me by 1-2 cm. The hard, flat edges hit right on the sides of my sitzbones, making the saddle uncomfortable.