I recommend reflex whey from monster supplements myself, cheap and easily one of the best brands out there. The chocolate flavour was very nice, i got the choc-mint one before but it gets sickening easily.
just avoid banana flavours no matter the brand, ugh.
Over the years I've tried banana, strawberry, chocolate (that brand you get in holland and barrets, ew), vanilla and choc-mint and chocolate gets it every time.