Is there anyone who has tried these Monitor Audio GX300, PL200 and the GoldenEar Triton 2 Tower?

How much difference would a good amp make. I tried the GX300 and PL200 on a Mcinthosh which sounded adequate. (I'm sorry for being picky.. but its an impression right after listening to my father's 24000€ Franko Serblin 'Ktema'.)

Thanks