My advice is to pay cash for IAH-LAX-OGG for $400 each, waitlist the upgrades (using miles & copay) and hope for the best but don't expect it (at all) to come through. Itinerary:
https://www.google.com/flights/#flt=...;sp:.USD.79978
On the way back, use 130k miles for 2 anytime awards OGG-DFW-IAH (so you get the lie-flat on the 772), but set expertflyer alerts for saver awards. If a set of saver seats comes available, put them on hold online
immediately, then call to cancel your 130k seats and rebook for 80k, gaining 50k back. There are 40k seats on, for example, November 8, but it sounds like you have particular dates in mind, and that (as you must know) comes at a price.
Apart from all the above, consider transferring 60k SPG to Marriott so that you have 270k Marriott, and then buying a Cat 1-5 Marriott travel package with those points -- that would get you 120k AA
now which you can't get after Aug 1. See the threads on the SPG and Marriott boards for more. Lots of speculation on what will happen with the hotel component of those travel packages, but bottom line, the AA transfer price is going way up in a week and transferring 270k for 120k AA is better than what you'll get next week even setting aside the added bonus of a 7-night hotel cert (or whatever we get as equivalent).
That would give you 190K AA, which is plenty to cover the miles/copay upgrades for the way out, plus the anytime seats on the way back, plus more for next time.