Need new bike ideas

I currently have an old Trek 4500 with the 80cc conversion on it, and it is starting to be crappy (bike, not motor) and I am looking for some new bike ideas. I also want something that looks pretty nice. I was looking at a sting ray but all the parts needed will be pretty costly. I was also thinking about putting it on a pedal dirt bike but all thier frames are wierd.

So anyone have some ideas?

I also like to offroad it a little