Defo road based filter, K and N or Pipercross are very good qual, the name of the game is to filter dust etc and OEM are ace for it just need to be changed and or checked often. BMC also good but pricey, tbh they all ok at doing the job but OEM filter most dust IMO.. up to you mate it's always down to price.. I run K and N now but sell Pipercross to RR7 owners etc they are VERY well made filter, alloy housing and fit well... Best filter is a clean one....lol
Cheapest I can find pipercross Is about 85quid K&n 50quid So prob end up going k&n unless pipercross are worth that much extra cash
Give demon tweaks a try mate just got mine from there will match any quote butt just to let you no going to be putting some bcm filters on at weekend if your intresterd