Its already been quoted twice, so I won't quote you again tompravi, just in case you start to feel "picked on"

As kartoff and concretefire have said, the chances of messing your mainboard up come from tinkering with various things and upgrading your BIOS (again, it does NOT matter if the BIOS is official or unofficial, the risks are the same) If you have a read of even the last 5 pages you will see these modded BIOSes do wonders for people, and 95% of the very, VERY few reports of a BIOS getting fubar'd in this thread can easily be put under the "bad flash" category. I shall openly admit there was a BIOS I made that did not swallow well on some boards, however that BIOS has long since been removed and now burns in the eternal flames of hell for its crimes.

So, it all comes down to the following; do you want to eek that extra performance and get additional bugfixes? If the answer is "yes", then these mBIOSes are for you

Concretefire; I don't think there is a way to have the boot logo display for longer, though if you want to look at the logo you could always hit the Pause\Break key on your keyboard, it'll halt the boot process and will only resume after you press the spacebar.