Welcome to ScubaBoard.
There are a number of online providers of scuba gear. Some are small dive shops with an internet presence, others are heavily internet based.
Personally, there are a few items I will only buy from a local dive shop and other things I am willing to buy online. In the category of local dive shop: masks, computers and anything directly related to my immediate survival or need to be fitted. In the category of internet: dive flags, dive lights and fun t-shirts.
Having said that, the internet type things are things I would recommend holding off on until you know what you need/want. Well, get the t-shirts now.
tridacna, is that flameproof underwear or a flameproof wetsuit?