I'd suggest a Spartan or H+S for tuning, AFE or S+B for intakes and as for exhaust it depends if you looking to change the entire exhaust or just the CAT/DPF delete. Assuming your thinking of running DPF off, we have a one piece CAT/DPF delete pipe offered in many different configurations from 4" to fit stock and all aftermarket exhaust to full 4" or 5" for aftermarket DPF back kits. This allows the user to pick the exhaust system that they want and tie it into one of our CAT/DPF delete. The Magnaflow and MBRP exhaust systems seem to lead the way in quality and fit. I see to many times customers spend the money on the best truck, the best tuner, and then cut corners on exhaust only to get something that fits poorly or leaks at the joints. The setup I suggest to my customers is Spartan tuner, AFE intake, one of our 5" CAT/DPF delete pipes and a 5" Magnaflow DPF back kit with muffler. This setup seems to give the best fit, look and sound without the air or hissing sound many complaint of. I have to admit though, after running the H+S Mini in my 6.7 truck it's a very nice looking small monitor. Almost thinking I need to try it in my 6.4 F450! At this point I don't think you can got wrong with either the Spartan or H+S tuners. Let me know if you have any questions.