Im thinking of maybe selling my m3 i hardly ever drive and getting a convert. How do they drive and handle compared to the coupe or sedan?

I might want to find a beat to shit one and rebuild it putting all the mods i want on i, but i dont know if it would be worth it, what do you guys think? Im also thinking about a miata

Its all relative, generally they will be heavier than a coupe or 4 door sedan.
It will flex more too, and sometimes leak when it rains, but on a nice clear day, nothing brings more joy than driving with the top down.
Beat to shit?? not a good idea, try to find an M3 vert, so you dont need to add a lot of performance right away.

id like to do a mini resto though, as i am almost done with my e30 and want something else to wrench on

If I could afford the insurance, I'd try to grab an M3 vert while there are still some un-totaled ones left. (Seems like I read about another M3 being totaled every week in the e36 section.) If you don't want the insurance premium, and you like wrenching, you can get a 328 and do some wrenching on that to get decent performance too. Mount a turbo (the 328 has forged internals) and you can really have some fun without the insurance companies being the wiser. :)

i say go for it. you will enjoy it

Go for it. When you are at the point of inspecting potential verts, check with us and we can give you specific areas and symptoms to check for.