Read some excellent info here and at Edmunds.com too. I dont know how they calculate MSRP over invoice. I bought a 2010 Ram 1500 SLT Quad Cab, Hemi, Big Horn, 4x4, tow pack, running boards, etc. MSRP was 38,000. I paid 31.500 before rebates. Total was 35,300 out the door with Gap insurance and about $5000 dollars of negative equity from my trade. If you have the time,I would say find the truck and options you want and then ask what others have paid for it. Some options hurt! A Quad cab with only 6'' less space saved me 4000 over a crew cab! But I couldve paid 10000 grand more and still been happy with that Hemi.
Man do I love my truck! Good luck on your truck.