A lot of good points made in this thread, we sell 20 plus clutch and flywheel combos a month and the majority go for the single mass flywheel and are very happy with their decision.
Its also worth mentioning that a dual mass flywheel will wear out and require replacement normally when a clutch is due.
Years ago cars didn't have DMF and we got on fine, in my opinion the SMF benefits far outweighs the small amount of chatter you will get at low RPM