I'm presently looking for case suggestion for my new project.

I want to build a media center server. I want the more drives bay as possible in the front since I'll have 3 optical drive and at lease 4 hard drives.

First, I can forget about form factor case, to small
Second, forget the "build your own" answer : my mom don't want me to play with azardous tool

Wich company make the tallest (and at the same time cheapest) case.

if you want it to run in Windows media center you need to purchase a media center PC. they do not sell it by itself

just put a haz mat sticker on there and then you will be fine

You actually can buy Windows MCE. Take a look at pcalchemy.com. They've got quite a selection of nice cases for what you're looking for as well.

Three response an only one was useful.

1. Read up on System cases. I believe you were trying to say that you want a mid-tower or full tower sized case.

2. What components will you be using in the rig?

There are a LOT of mid-tower cases that have 5 external 5.25" bays and a good amount of internal bays. The Coolermaster RC-531 has 5 external 5.25" bays and 4 internal 3.5" bays and it is only a mid-tower case. You need to be specific on what you will put in the system initially, desired expandability and price range.