Bad creaky FSA Gossamer crankset

My Gossamer crankset is creaking/clicking to buggery. Was going to swap the bottom bracket over for an Ultegra one given that the FSA ones seem unnecessarily expensive.

Anyone forsee any probs with using a Shimano external BB instead of an FSA one.

Issues is highly likely to be the BB30 bearing rather than the crankset, take it back to the shop and get them to check/replace the BB.