In reply to plyometrics:
Feels very odd offering my experience following John Arran's! But here it is none the less:
Street shoe (air max): 9 / Old anasazis: 8.5 / New NIADs: 9 / Ninjas: 9
The ninjas I found impossible to get on with. Even at street shoe size they were unbelievably tight and highly unsuitable for my level. They were ace to climb in I have to say, but a good lesson that I in no way needed a performance shoe like that. A nightmare to get on/off and they had to come off inbetween every climb, contrasted with my NIADs which I can wear for hours and hours.
If you can, I'd buy both street size and 0.5 under and then return one.