I just bought a 2001 F-150 Crew Cab and i want to make some performance upgrades. I want to get cold air intake, throtle body spacer and full exhaust (hi flo cats and true dual). What i am wondering is...what is most commonly used for each of these? As far as the exhaust goes...i would like it to be as loud as possible without straight piping it but i would also like to be able have a conversation while driving. Im looking to spend $1500 or less (less would be nice) and i would also like to able to install these items myself. Thanks for the input.

P.S. Im not looking for just brand names, i would like to know brand and model.