i've also used internethobbies, freetimehobbiees, dragononline usa, squadron. luckymodel out of hong kong seems to have good prices and cheap shipping because it goes by boat. if you don't need it for 2 months it's fine.
i buy a lot from LHS since they give IPMS a 15% discount. so between taxes vs shipping if it's for a few dollars more (cue movie theme music) i get it there. if it's half off online than any of the online stores mentioned.