Hmm I'd go for the Freetime over the old Elemental because I prefer the leg elastics on the Freetime (and the new Elemental), and the old elemental took ages to dry when we had them whereas the Freetimes are really quick. I haven't tried the new Elemental but those issues have been addressed so if I had to buy a set number of nappies I'd probably go with a 50/50 split or 75/25 (more Freetimes as they're cheaper and quick drying) - Freetimes for when you need quick drying nappies and for normal days, but Elementals for when you need extra absorbency and no chance of compression wicking e.g. in the car or buggy.
I also prefer nappies with stay dry fabric next to LO, having to add a liner annoys me so I would probably go for the 75/25 split actually. I wasn't too keen on the way the absorbent bits folded up inside when you adjusted the size of the old Elementals - it always looked lumpy and possibly uncomfortable for LO to me. From looking at photos, I don't think this is the case in the new Elementals, they seem to fold flatter.