Original Owners ?

[Wazzu1336]

I bought an 08 H3 Base back in 09 with 18.5k miles on it and ended up selling it due to school expenses when it had 65k miles with no issues. I've had some serious withdrawals and looking at getting a new one. The ones that are in my budget typically have around 80-110k miles. Are there any things I should look out for when buying one with that many miles? I see a lot of 3.5L with upwards of 150k miles. I loved the 3.7L but is there that much of a difference between the 3.5L and the 3.7L? I'm open to either engine but want to know what kind of expenses I could be looking at getting into with those higher miles, anything I should look for?