Sounds like it's coming from the front suspension area, not too bad but slightly irritating. I've got VWR springs fitted, I know it could be a number of things but could it be the bushes need upgrading with something like these:
http://www.awesomegti.com/shop-by-brand/superpro/superpro-front-wishbone-bush-kit-for-mqb-vehicles/
http://www.awesomegti.com/shop-by-brand/superpro/superpro-front-wishbone-bush-kit-for-mqb-vehicles/