I'm using the FS Dreamscapes mesh for Hawaii, love it. Shows a lot of small features like old cinder cones, especially on the "Big Island". Those generally just come out as small bumps, otherwise with the default. Works fine on Oahu too with the MegaScenery and Mr. Womack's Dillingham. You do seem to get more "plateaus" with the smaller default airstrips, but of course that's FSX's inability to show those airstrips that run uphill/downhill usually.
Can't say for any other states.