Dude you need to be patient, its only been a few hours, I have a thread or two here that has not been replied to too in weeks...the general rule here is to bump once ever 24 hrs I believe...
It sounds to me like you are wanting two different things, a web server, and a storage server. I can't fathom why you would want several TB's of space for a web server. I host a ton of clients rather large sites and even with backup 500GB is plenty.
A server is just a computer, just like anything else you would build, so don't get all worried its gonna be hard or anything.
Heres what I recommend, save your cash on your jumbo machine, get a hosting account on the web (few bucks a month). I can't figure out of you mean you want to host clients or you just want something to test on. If you want to host clients, you definitely need to rent a VPS or something, if you just want something to test with and run a personal site, do it on a machine in your house...Heck you don't need a special machine to run that, you can run a web server (apache) off of your desktop, either with something like xammp or one in a VM.
You probobly dont want to run a storage server (with sensative data on it) and an active web server on the same machine for security reasons.
If you just want a machine to be a web server, you can pick up a cheap single core and that will be just fine. Unless you have a ton of concurrent connections really taxing your server that will be suitable...My local web server on my home network is a single core celeron and it hosts some personal stuff just fine.
I asked a long time ago what a good storage server build would be, still have not gotten an answer, read the last page of this thread for my thoughts, for what it is worth:
http://www.overclock.net/servers/353...m-build-6.html
But heres the thing, I don't have experience building a server like that, so I am not going to spout off and tell you to build this crazy machine with these parts I have seen on the web.
Sorry I could not help further....