FZ or Fazer or Avenger !!!? Totally different classes :S
I think the Op needs to decide what is he exactly looking for. A street bike, a tourer or a cruiser coz these are the classes that each of the bikes mentioned belongs to respectively.
I have ridden both the FZ and avenger.
FZ is pretty good in terms of handling and performance though a bit behind in terms of mileage. Also its not exactly recommended for long distance riding.
Avenger is in a different class. The engine is not top notch, though mileage is pretty good for a 180cc bike. if ur not a saint while riding then this bike is not recommended. Firstly, handling is not bad but, since the bike is heavy it does tend to skid a lot. U need to consider the weight of the bike before taking one of those nasty turns which otherwise u can do so confidently on other street bikes. Also it is one of the most comfortable bike out there but only for the rider. For the pillion rider it can be a real PITA. Also i have noticed this bike tends to give some problems wrt gears, clutch etc after a period of time. Nevertheless i still love this bike for its sheer sound of the engine. It makes u feel king of the road (until a Bullet rider crosses ur path
)
Fazer, yet to ride this bike, but frankly i have heard lots of neg. review from the friends who have bought it. Although its meant to be a tourer it doesn have the qualities for any class. I have heard its terrible in handling. Also some issues with the headlights. But I won pass any verdict on this bike yet till i ride one. Check a few reviews online about this bike. I din find it impressive. And definetely not for that price :hap5: will prefer a Karizma over it anytime. One of the best bikes to ride on.
I suggest u mention ur requirements so u can be helped accordingly. Also try the Dazzler or whatever the new Unicorn is called. See what best suits ur needs. IMO Unicorn is a wise choice too. Although the fibre / plastic parts can occassionally trouble u. Probably they have fixed those small issues in the newer models.