Hey guys, I'm trying decide on headers and need some help.

Has anyone installed headers by themselves, if so how much of a pain is it?
I already have a stainless works cat back system on my v coupe that I put on myself.
Anyone have headers that they like/don't like. I really don't care how loud the exhaust is outside the car, I just don't want it to be deafening inside. It's just about right now inside with the cat back system.

Any mods that would be easier to install at the same time as headers? I alreat have Cai, upper pulley and injectors.

Thanks for any help/experience.