Wait until individual tickets go on sale would be my choice out of all three. You'll pay face value that way and there will still be plenty of great options open. Calling them direct is a great option even better than the website.
Seats depend on price, unlimited budget? 40-40 yard line 10-15 rows up. Club seats are also amazing although you can get some great seats a column over from the club seats on the far side for less. If money is an object I would recommend 2nd level end zone seats (I think they are better than 1st level endzone) in as low a row as possible (near the rail). 2nd floor also has some secrete hidden Washrooms which is a major bonus. Ford Field has a ton if great vantage points though chances are you won't be disappointed.
Parking - again price. You can park right off Woodward across from Comerica for $35. I myself like to park in Greektown - tailgaiting, food, bars, liquor store tons of fans. You'll pay $15 or $20 there. You can park for free by the MGM Grand on the street and take the people mover but I don't recommend it.
