So, from what I can tell, both 2.2/2.5 are good, just 2.2 is more bulletproof and preferable. Unless the seller has documentation that the timing belt and head gasket were replaced around the 100k mark, I should expect to replace them myself, just to take no chances with them failing. Tight turns to check the awd torque bind and decent test drive to heat up engine and check for leaks, besides all the usual common sense stuff when purchasing a used car. Thanks for the help and advice.