In Belgium:
I could not find an internet address, but this is an excellent shop in real life:
PHOTO CINE HOUSE SPRLThey are competent, can give advice and have a lot in stock (accessories, most bodies and lenses, Nikon, Sigma...). The prices are a bit high for Europe (typical problem in Belgium and in France) but I recommend them because of the service and the immediate availability of most of the equipment.
http://www.fotokonijnenberg.be
A subsidiary of the same shop in the Netherlands. Interesting prices for Belgium. A lot in stock, usually. The only problem they have is the opening hours: closing at 17:30 is ridiculous nowadays (typically Dutch BTW). Most people with the money to buy the equipment they sell work long hours and can never go shopping before 18:30 or 19:00... I think they could have much more business by extending their opening hours, but that's just me.
An excellent shop specialized in everything about light (strobes, lights, studio equipment, tripods, etc...) A lot of choice and very reasonable prices.
In Germany:
Interesting prices, excellent service, very small shop and the owner is fluent in German (of course), Dutch and English.
In
fact one of my favorite shops, I bought a LOT of equipment from them.
Good advice, good service. Highly recommended.
In the Netherlands:
http://www.cornevaniperen.com
Internet shop, competent owner, good service, prices are rather low, no shop.
This one just closed recently = not available anymore - a pity.
http://www.fotokonijnenberg.nl
excellent shop in the northern part of the Netherlands, they also opened a shop in Belgium
real life shop with good prices (to be compared with the other shops of course)
idem - interesting real life shop
In the US:
The well known shop in NYC. Incredible choice and excellent service.
In Canada:
http://www.kerrisdalecameras.com
My favourite shop in Vancouver - they have a number of shops at different locations in the city and they have a good selection of used equipment. A bit expensive, though.
The best shop in Toronto. They have a lot, sales people are knowledgeable. Again, not the cheapest solution but highly recommended. They have a lot available in stock.