Don't discount an Airsporter MK2 if you come across a tidy example, even though the MK2 was altered to be a bit cheaper to produce than the MK1 it is still a well made gun.
The early MK2 had four short oddball sized scope grooves in them, but the later guns came with two long scope grooves which enable you to easily fit a modern scope if you wish.
All the best Mick