I don't think there is such thing as too muh boot for street riding.
I believe mine are the smx-5. I have has them since I started riding about 5 1/2 years ago. They were a bit squeaky at first when walking around but that eventually stopped. I use them for street and track. I don't think I have ever ridden without them. I think they are really comfortable.
The SMX-5's offer the least amount of protection in the A* line up so I definitely wouldn't say they are "too much boot". They would be a lot better than wearing shoes.
I've had the vented version for a full year now. Worn 4 or 5 days a week, pretty much every week, even through last winter. Very comfy and no signs of wear. Never been down so I can't comment on their protection vs a Sidi, but they're solid.
The SMX-5's (vented) are the only thing i ride with....all street riding (for now). Very comfortable, even if you have to walk around for a while. Would definitely recommend them to somebody looking for boots.
have ridden in 100+ heat to ~27 degrees and the do pretty well in all temp ranges...
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