well it's just one of those things
if you missed classic record the first time round then ....well you missed them.
they may sound fresh and exciting to you but if you have a dancefloor full of people who have already heard it you just won't get the reaction you want / think you should.
there's nothing wrong with playing the odd oldie but a few too many and it gets a bit obvious.
unless of course you are playing a " classic " set
personally i would try my best to stay in touch with recent techno as these are the records of the future .... you don't want to miss classic records for a second time around eh???
this time you gotta make up your own mind about them though
it's a challenge , but then you like techno so you must like a challenge.