and don't forget that you won't have to worry so much about getting "sub par" parts, assuming that you made a good selection to begin with. another advantage is that you can save yourself a pretty penny if you're willing to shop around for your parts rather than getting everything from one source.
about the only downside is that you won't get your tech support from one company. instead, if you have a hardware problem, you're gonna have to do some investigation on your own to figure out where the problem is coming from and then contact the manufacturer's tech support to help solve the problem. then again, that's partly what we're here for, although i wouldn't completely rely on us for all the answers since we aren't likely to know everything.
See the struggle of the faithless lot as they negate their time
How low to sink to the depths of their frame of mind