> I drive less than 2k a year and 90% of those miles are going 70mph or over.

Then... drive what ya got. You're going to have time-based depreciation like nobody's business.

> Would you suggest just taking on the $400-600 monthly payment of a new vehicle or stick with what I have?

At that, you'd be paying on the order of $3-4 a mile, just because the fixed costs (insurance, registration, time-based depreciation) are gigantic in comparison to the miles driven.

Were I in your shoes, I'd buy a used Leaf or something similar if you don't like the Hyundai. I can't think of any good reason to buy a new car and sink hundreds a month into something that only will get driven a couple hundred miles.