I too have one of those (insulated air core) and it's one of my goto pads for heavy winter trips - it does weigh two pounds, which for me is quite heavy. The thermarest types are lighter (neoair, etc.). however, no amount of weight is really
too much if it's what you *need* for decent sleep
The trick is finding out about "need" versus want.. (I mean heck, if I took what I wanted into the bush I'd be on the Westin Heaven Bed every night).
I'll reiterate to try at home. Most newbies with insulated blow up type pads tend to blow them up really hard, thinking they get more "padding" from the ground that way. What really works for most people is to do that, then let *out* some air while on it till your butt or hips just touch the ground, then maybe give it a puff or two of air back in - that way you acually get some cush to the pad. Makes a huge difference even with the thinner pads like a thermarest pro-lite.
Buying (or renting) a pad and sleeping at home for a few nights can got a long way toward you figuring out both what you need, and all importantly, how to use it so you are actually reasonably comfortable, and aren't trying to figure out out how to sleep comfortably for the first time at night in a dark tent that you just set up. Rentals and liberal return policies can let you try out a few kinds before you buy too...