For the small difference in price, I'd get a OEM Honda T-stat.

Now... How hot does it get? Standing still, it's normal for the temperature to climb just above 50% on the gauge. When the fans come on, does the temperature go right down? If not, then maybe there's more to it. Try to look in the radiator for crud & scale.

Theoretically it's pretty simple to replace the T-stat, but the 2 bolts on the housing are awkward to reach. Behind & below the distributor, you'll want to remove the rubber intake tube. The thermostat gasket might be all gummy & stuck, so spend some time cleaning the surfaces.

New T-stat should come with it's gasket. Fit the gasket onto the edge of the T-stat. There's a little round cut-out in the gasket for the little rattle-pin. Then there's a couple rubber nubs in the gasket to position in the corresponding cavities in the T-stat housing. That puts the T-stat in the proper orientation.