Hi there, I live/work in the USA (east coast) but thought I would respond.
We, at my company and at home, use Avast exclusively and it works great under x64. The price for the professional version is very reasonable, when compared to other AV applications. We recently installed a single license of
Avast Professional with a 3 year license for just $74 (and change).
On the job, we are technology problem solvers, when we remove other AV products (usually because they are expired) and install Avast Home Edition (or the Pro depending on location) all sorts of things start getting found. Makes us wonder what the other applications are doing.
Anyway, just tossing in my two-cents.
Happy New Year!
Tekjnke