[zero157h7]

The advantages to custom rom is that you just get a device that works better most of the time. Different roms have different features so it is really something you have to learn. Some people like a super clean rom so they can customize what programs are installed. Some like a loaded rom that has programs already installed.

The advantages to the stock rom...

...you don't void your warranty. That is the only one I can think of, but it is not like you can't back track to cover up a custom rom.

As far as radios go, it will just depend. A radio can change your reception on cellular or gps, and it can affect battery life. It is best to get an idea what everyone likes the best if you do not want to jump around and test them all out.

A kitchen is where the ROM is cooked by chefs (ie this is a program on a pc to configure and build the rom.) If you learn to use wone you can cusomize the rom how you want it.

Most good custom roms out there have all of the neccessary tweaks need to speed up your device.

EDIT::: Best tip for someone new to flashing is do not do it until you have read a full tutorial for your device on how to do it. You need to know what you are doing or you will end up with a sexy paperweight.