As much as I understand the need for power, if I had $1500 to spend only, I'd buy an axle back exhaust, lowering springs, a shifter, lower control arms and an oil seperator. You'll be under budget (around $1200), look good, sound good and run like a bat out of hell. AND you'll still be fully covered under the factory warranty.
The cold air intake and tune are great, but the coyote makes so much power they're really not needed. The tires are also nice but stock suspension with invos still won't beat stock tires with suspension work.
2012 5.0 GT M6 Grabber Blue
300A, 3.73s, Brembo Brake package, Lethal O/R X-pipe, Mac axle back, JLT CAI, Lund cammed tune/Bama race tune, J&M LCAs, FRPP K springs, Tokico HP struts, MGW shifter, 305/18 NT555Rs
2012 Accord SE - DD
Lost loves: '97 Acura CL, '08 Mustang V6, '05 Pontiac GTO, 2011 Civic