Yes,
K&N would be a good! altough all aftermarket airfilters have good quality.
I use K&N on my cossie. Is it standard? if no you can make a power upgrade too! you can make a stage 1 chip on the standard injectors with no more fuel required. Would be good idea if you if you change the wastegate actuator for a -31 and then raise up the boost to ......... let's say, 1 bar(14.7psi) 18 psi maximun.
Paul