ive never gotten a firm answer nor has previous threads properly given me the 1+ 2= 3 answer. i have an 07 525i w/ non projectot halogens. i want to upgrade to projectors, not lci due to the price. can i swap my oems for any projectors of any other year or does it become problematic??? is there a year i must stay away from ? i know it seems like the usual question but i just didint find any straight forward answer, it tends to lead to another answer..