How much you looking to spend mate? Ion are just a cheaper label Numark do and aren't really worth the money. If you can cobble about £350-400 together then you'll get a nice, well serviced second hand pair of Technics which will last you years and are a heck of a lot easier to mix on that cheaper decks. I made the mistake when I first started out of buying cheap direct drives (think they were Gemini 500's) and it really put me off DJing.
Numark do the TT200 if your tight on cash, a new pair of these is about £300. Pretty good decks for the price, used these a few times at house parties and found them to be better than I'd expect Numark to be. I'd say they are your best bet if your budget is low. Stay clear of anything below this as they aren't worth the plastic they're made from.