Micro ATX Motherboard

Not Dell, HP, etc. Prebuilts with proprietary components, but the ones that use off the shelf components and sell in major retail stores. They seem to always use a full size ATX case with a micro ATX motherboard. Is there any point to this apart from saving costs with the motherboard but making...

I've seen a lot of questions surrounding this issue, but no-one seems to have quite the same issue as me: I have set up RAID0 with two SSDs and successfully installed Windows 7 on the new array (installed drivers etc). Now that I've got everything set up though, I've reattached my storage...