Welcome. I made a similar upgrade last year, from an '05 LE AWD to an '18 XLE AWD.
Tires? Lots of opinions on the forum. Not sure if your SE has different sizes than my XLE, but since I have (had) run-flats that were getting close to replacement, I replaced them within a few weeks of getting my van. I have used Michelin Defenders in the past, went with them again. Got the same width (235), but went up one size on the aspect ratio (60, instead of 55). That made the tire just a wee bit taller, which made the speedo agree with my GPS and give a slightly softer ride in the process. Yeah, most of the ride improvement was due to getting rid of the run-flats, but I prefer the 60s over the 55s anyway.
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