do I have to align after getting 18's
 

Is it really necassary to align the car after I put 18inch wheels on it? Also if I do eibachs do I have to align it then too? Thanks

Yes

and

Yes

If you plan to lower it within two months or 2500 miles... go ahead and wait.

Also, you should get it aligned at a Front end shop, not just any tire store. I would ask the place if they just reset the car to STOCK setting or if they insure they get the tires square to the pavement, even on a lowered vehicle.

Good luck.

MW