Hello, I need your help.
I ride on asphalt and unpaved hardened forest trails/gravel etc. mostly. I don't do and I don't like dirt, swamp or serious MTB biking. I won't do serious race events. I like speed, lightness over going extreme with heavy bike. I will travel around 30 to 80 km per day (3-4 times per week). I'm 190cm tall and weight about 65kg.
For now, I can't choose between
hybrid/Fitness vs hybrid/Cross 
.
I chose either Centurion Cross Speed 500 (which is hybird/fitness, i guess), either more mtb-style Centurion Cross Line 500.
Also, for fitness I have found alternative like Specialised Sirrus Sport.
Now I have serious dilemma here. As I now own old MTB with knobby tires, it's hard to pedal on asphalt, plus it's very heavy and not suited for me anymore. So with fitness bike I'm very very very afraid I wont be eligible to drive over gravel, I will always get flat tires, I will break it, it will be harsh/uncomofortable to drive on gravel with fitness bike. Does it really like this and i should get hybrid/cross bike or quit crying and get hybrid/fitness? Which should be the best for me? Please, help, I'm starting to panic...
I know it's best to get real CX bike or even light 29er, but they are way too expensive for me.
Sorry for my grammar. I'm from Europe.