I got a pair of R-Jays speed boots. The are ankle high sneakers with armour in the ankles and re-enforcement in the toe and heal. http://www.mcas.com.au/product.php?section=1&prodid=1561.
I bought them through work as my workboots as they have toe re enforcement so only had to add $17
Use my Gaerne boots for riding fast.
on super short trips I squid it in my skechers tennies, in normal to and from work/around town I go with over the ankle boots(nothing special ~$20 at volume shoe source, but they go above the ankle and better protection then tennies.) and when I am going fo a ride, my 2 piece alpinesars and my sidi vertebra 2 airs. these actually do flow air pretty good and it helps keep me cool.