Lowered springs always have to compromise on stiffness otherwise you are going to compress the springs till you hit the bump stop. Unfortunately, most stock dampers are not made to handle the stiffer springs and will pretty much f up your ride as stated by omnimech.

You can try BC V1 which should be cheaper than the BR and not as stiff. I just got my second set installed after my first set of BC went kaput after a couple of years. I rode for almost a year on dead dampers before I had the time to change it. You can go to G1Racing in Sunway which is the distributor to get it installed and get an extra one month on warranty. That was where I got mine done last weekend.

RM2800 for the V1 and RM300 for installation and follow up settings.