There very few..
T.W.O. (Two Wheels Only).
The best. If they like bike they will tell you, if they dislike it or it has major problems they will just come out and say exactly what it is wrong. It British, so the prices are all in pounds. But there bikes comparison are second to none. Sometimes Barnes & Nobles has them. If you want to stay in the U.S., Sportrider is also very through, but not as good.
The bad news is T.W.O is about $9 to $10 a copy at the newstand. Subscription is about $70 a year with the discount online.
If you like bling then Super Streetbike is okay.