How much will it cost to get my truck straight piped?

I have a 2007 ford f150 extended cab and i was wondering how much and what kind of pipes to get. I dont know whether i want straight pipes, flow masters, I DEF. dont want gl pacts (hate the popping). And how much it would cost to get it done. Also i want a 45 degree angle on them with 3 or 4 inch tips. Whats the difference in tip length and would i be able to tell a difference?