Check out www.cargurus.com. You will absolutely be able to find what you are looking for. I'm in the same boat as you! Only difference is the wife and I were looking at a 2014 mazda 6. I'm looking for a LS460L. The only options I don't want are AWD, executive rear seating and air suspension. Also looking for light exterior and interior colors.
As for prices on parts go to www.rockauto.com! This luxury car will cost just as much as any other Honda or Toyota on the road today. You just need the right information not to get screwed by dealers or mechanics. If you do your own maintenance this car isn't special as it uses standard tools to work on. The average DIY'er will be able do the majority of the work on this car.