I'm using my 7200FX for light trail riding and general utility, but I'm always pulled back to my ancient Trek 1000 for longer road rides. The fork and tire swap look reasonable, so I say go for it. But keep in mind that a road bike will always be faster. The main differences are:

A) The hybrid is heavier - even my more ancient $200 "10 speed" is a smidge lighter.
B) The hybrid geometry forces you more upright. I've removed the spacers below the stem on my hybrid, and re-adjusted the stem so that it is level with the ground, and it is still relatively upright.

But perhaps the best solution for you is get your friends to take pity on you and take out their mountain bikes while you keep the hybrids. You'll cover less distance, but the fun is the same.