Squadron is great!... good service and pretty good prices.
But if you want to buy models made in Japan (Tamiya, Fujimi, Hasegawa, etc.), try Hobby Link Japan here: http://www.hlj.com/
They have great prices, and even with shipping it's cheaper than most anyplace else. They do give a shipping estimate for most models too.
And it is pretty fast too... about 4 days the Oregon from Japan.
my 2 cents worth anyway.......
www.naplak.com/modeling ... a free site for modelers
www.scalehobby.com/forum/index.php ... a nice Modeling Forum