Marvel have just created a massive jumping on point for new readers called Marvel Now a good place to start would be All New X-Men 15 issues are out and 2 trades (5 issues in a collected format in this case) are as well the basic synopsis is Beast travels back in time to stop Cyclops killing Prof X. ( this happened in Avengers vs. X-Men) so he brings the original 5 (cyclops, jean grey, bobby drake/ice-man, warren worthington and beast) x-men to the future.
Of the Marvel Now initiative this is probably one of the better books other good ones are X-Men, New Avengers, Superior Spider-Man, Avengers and Thor god of thunder.
the individual issues retail at £2.99 at my local shop. the trades are available for around 11.99 RRP but usually have a 30% or so off the price on amazon.
