There are times where you can luck into a deal and get quality components on the cheap, but those situations are typically few and far between. Better to save a little more in the short term (in relation to how long you own the vehicle) to get parts that will more likely last the long term. Like you said, 'you get what you pay for', but be careful and make sure that is the case. There are jerkoffs (some companies too) out there who will talk a good game, and sell you worthless crap for big money if you let them.