hi dave, i havent tried the numark but try find an alternative to the vestax. it's a bit heavy & bulky & doesnt play too loud. it also eats batteries.
is a battery portable a necessity? there's a great 'plug only' one that turns up on ebay.co.uk quite often. it's a generic 70s player called 'fidelity' - it's the best portable ever! it's reasonably light , neat & plays very loud. will try find a link if you are interested.
pm me if you wanna know more, i used to collect portables - what was i thinking?