hey i have the ATS 80 and love it. i think the ATM model and the 65 mm size would be a great scope for packing. i wish i had the smaller one. i went to the NRA show in charlotte NC a few weeks ago and looked at the razor spotter, i have some razor binos. i was really impressed with the spotter. i wish i could have taken it outside, but it was really clear and bright. it is a big spotter and i guess that would be my only concern, but if the extra weight is ok with you then it is a great scope and the vortex warranty is probably the best. after all this i would get the swarovski because i bleed green, but the razor is a nice scope as well.
good luck,
phillip