When I break medium and hard the front end whobbles not a hole bunch but enough. This never
happened when I had my stock wheels 15x7 but
with my second set of 15x8's it started to
whobble. I just figured thats what happens with
a larger wheel on the front

 

warped rotors. Probably either got hot, of the wheels were installed with an impact wrench and/or were tighten too tight or uneven.

 

time for new roters right? I can do that myself correct?

 

Yes, it is really easy. Infact put new bearings or re-pack your bearings up front. I am running Stillen cross-drilled rotors for the stock replacement for my car.

Later I might upgrade to larger, 1LE sized rotors.

http://www.stillen.com

 

Likely warped rotors. find the cause. check that the rear brakes are working properly (mine were not), if not the front is doing all the braking and overheating and causing the rotors to warp. Also you might want to try another set of wheels on the front to see if it's the wheels. borrow a friends or whatever.