B&H Photo is the place I've used for years with no problems at all. Not true for MANY others. Be sure and read the descriptions carefully--they will weasel word you. Example I fell for from Cameta--"full service USA warranty" doesn't mean it is a USA camera but likely a plastic overseas model you will not like. I had one whale of a time getting my money refunded but I used a credit card fortunately. It took two months for the credit to be awarded.
If you are ever in NY City, a friend told me it's worth it to visit the B&H store, a full city block, and they have in-store bargains that are worthwhile.
KS George