The bag on the 2.4 is going to be freakin huge. You building up a burly brute of a 29er or a versatile & capable HT?
For the record, anyone who says their dual suspension trail bike is the same as riding an equivalent angled HT, & suggests they function even remotely the same, is either smoking crack, has forgotten to take their meds or spends too much time on a computer looking at bike porn instead of riding. Each to their own but I flat-out disagree with the sentiment that HTs offering anything more than a 120mm up front are horrible to ride- anything 160+ then yeah, starting to get into some funky handling characteristics, but anything under that is 100% about technique or absence of. Yep, you do need to ensure that you're setting your fork up A1 to avoid diving into your travel unnecessarily etc but ultimately it comes down to technique & the way the rider is positioning their weight which determines how hard you're diving into that travel.
Bottom line is that whichever Stanton frame you go with, it'll be a fun bike, & your technique will improve outta sight, particularly once you apply it to your duallie. A pair of DP RS Revs that allow you to flip between 120-140mm will be the way to go. Likewise if you're happy to wait then maybe consider doing so if it means you'll be able to pick up the 12x142 version with the extra room in the stays...with that said there are some killer deals going on Hope's 10x135 EVO hubs etc & Hope will be continuing to service the 135mm market for another 10yrs at least (straight from the horse's mouth). Great thing with Hope is that it's virtually tool-less & the 10mm-thru axle end caps are super easy to swap over etc. DT Swiss are producing some nice lightweight thru axles to suit, as too American Classic.
As per SF Trailboy, the shipping (w insurance) by Stanton was $268- looked at organising my own courier etc but the pricing with insurance blew right out.