looked into the HR & MR series engines but they are a fair bit heavier then the CR's and dimensionally bigger as well.
It would likely be lighter to run a cr10de+t (sleeved to ~940cc) then the HR/MR16de, plus it's much easier to get the extra power from a turbo then NA tuning, plus the turbo will likely have more torque. only advantages to the NA are lighter (which in this case isn't likely) and the better response.

I'm guessing the MA10ET would be easier to source, then sleeve it to achieve the same capacity. I'd not be too fussed about the lack of supercharger while on the track (the reduction in weight would be nice) but i'd likely miss it on the road.

I was ideally looking at sourcing a MA09ERT half cut to be put unmodified into the car and then a second MA10ET engine for a spare/engine i could build up when funds permit