how to construct the floor in the cellar/basement...

I'm considering 2 options, both result in having a chipboard (can't
remember the proper name) floor, if only because of impact resistance
(as apposed to concrete) if a child falls over

the 2 methods I've found are...

#1...

chipboard
2 x 2 batons
vapour barrier
quilt type insulation (not sure what this is... anyone ?)
100mm concrete
DPM

#2

chipboard flooring
vapour barrier
2" polystyrene
100mm concrete
DPM

what, in the groups opinion, would be the better option ?

bearing in mind this cellar has direct access, via a DG PVC door, into
the garden and a fully opening window.

thanks
LJ