it's all about the convenience factor. I can buy this small little box that doesn't look "too" out of place and thats it, for this price. OR...
I can research pieces, damn so many options.... umm, ok this case, no wife doesnt like that one, ok this one. Ordered, wait, wait, wait.... SWEET fedex guy just delivered everything, nice, nice, nice.... putting it together, oh you've got to be kidding me I know i grounded myself before putting that in there freakin static electricity!!1.... can I get to FRY's before they close? GD@#%#%@# traffic, ok they have it, get home. YES Honey I'll be to bed in a minute!! Ok, installing Windows whew got this far, go smoke while im waiting. K, install this, install that, downloading updates, etc. etc.
I do admit when I was alot younger I went through this and I have my battle scars, physically and emotionally but, if I've worked enough so that I can walk into a store, not be harassed by 5 separate salespeople within 3 minutes pick up what I want and leave (after paying for it first ..don't steal!)
then that's what I will do.