well if you insist on spending more to get the same thing, then you can just buy the parts on that machine I linked and then take the time to build it yourself. But I promise, you'll just be wasting time and money.
The only time that custom building machines becomes economical is when it's TOP END performance.
My bro bought just parts and it took him about 18 hours to get it squared away. That was a particularly pesky build - it should not have taken that long but there are always unforeseen hiccups. We got the prebuilt and I slapped a vista OEM on it and it was running in less than 40 minutes.
if i have the parts on me, it takes about an an hour or 2 max to get it all together.
I understand ure point of view but i rather just build it myself....i'm a pc builder and its a personal choice....