It will probably be hard to beat the HG, but if least expensive is a major plus, you should consider AHE.
This is about 5 oz heavier than the HG, and the HG is rated about 5* warmer (HG 20 vs AHE 30F). But, I have always suspected the AHE ratings to be very conservative for most folks. And sure enough, quite a few folks have reported using them way below the rated temps and being warm. Also, the learning curve for the AHEs seems to be pretty easy, as there seem to be very few threads with people reporting trouble being warm at the rated temps. So the fiddle factor seems to be lower than usual. And if moisture is a concern, you would have the advantage of super quick drying Climashield.
It's biggest drawback is going to be volume, the HG will probably pack a lot smaller. But maybe it's biggest advantage is that it cost ~ $85 less. Either will be a fine choice.
For I consider that the sufferings of this present time are not worthy to be compared with the glory that is to be revealed to us....that the creation itself also will be set free from its slavery to corruption into the freedom of the glory of the children of God. For we know that the whole creation groans and suffers the pains of childbirth together until now.