Shoe Advice

After a couple years of putting up with numb pinky toes and hot feet, my Sidi's have decided themselves retire (broken buckle...I may have to duct tape the shoe on tomorrow).  I didn't have the same foot issues in my old shoes, so am going to try switching brands.  After some research, have been thinking about the Fizik Infinito or the Specialized S7 (go big or go home...sick of numb toes).  If anyone has tried either shoe (or another model of these brands) and has some advice to share, I would really appreciate it!  Biker's Choice would only order them in to try if I made a 20% down payment, so looks like online will be a better option.  

Thanks,

Lindsay