Im looking into new wheels for my sedan.. specs of the ones im looking at are:
20x9 +25
20x10.5 +25

would i have any problems with this set up? I am not lowered

 

you shouldnt have an issue .. Im running 20x9 + 32 front and 20x10.5 +45 rear and Im not lowered yet .

 

Those offset are extremely aggressive. Most sedans are in the +30/+40 front and +35/+45 rear depending on widths. Read the Aggressive Fitment thread in my signature.

 

those will stick way out

 

Those are definitely coupe offsets. To pull that offset off w/ a sedan you'd have to be slammed, stretched, and probably cambered too.
My rears are only 10" wide w/ a +45 offset, I'm lowered to zero gap and I'm flush to the inside fender lip. With a +25 on a 1/2" wider rim without being dropped you'll be 1" further out than me, and another 5mm out from being at stock height. Here's my fit for reference~