The trick is to get quotes from multiple dealers and start from there. Most of the dealers offer the same models so quality is pretty much the same arcoss the board. Dealers usually charge more for customer service but in my opinion apart from Aspire (which people here constantly rant about) and possibly Luckyyy, the level of customer service is, again, the same. So you might just buy the cheapest one.
Also some dealers here offer free shipping so make sure you factor that in when you buy a rep.