I don't know how the G35 will fare in terms of resale and I agree that Lexus has the better track record there. As to the service, only time will tell with my M35 but at this point I am very happy with the service I am receiving so far. I don't know where you live but the Lexus dealers around here aren't all that pleasant to deal with. This probably comes from having a product that just sells itself. If I was to choose just the dealer experience I would have picked Infiniti.
I suppose I should try to see what the next G35 would look like. I would hate for a new model to come out right after I buy one. The new IS is beautiful!
I absolutely love the M35! I never ever considered Infiniti till I saw it. My parents had been driving Lexus for a long time and I had always planned on getting the GS300. If my dad had not raved soo much about his M35 and Lexus had not changed the GS so radically I would probably have gotten one.