Thanks for the wonderful review and photos!

Think I'd echo your comments for both properties really and specifically:

• Amansara Pool Suite isn't worth it - book lower and hope for the upgrade. What you do need at Siem Reap though is a hotel with a very good pool, and Amansara has two (three if you get the upgrade to the pool suite).
• Food at Amanoi some of the very best I've had - consistently better than at Aman Indonesia (although the latter's best dishes still take the cake, so to speak).

I did have the chance to stay in an Amanoi Ocean Pool Villa - is it worth booking into by itself? Difficult - I'd argue potentially yes. I do think you need to book an Ocean Pavilion (and hope for the upgrade to Ocean Pool) though rather than booking Mountain here, as gorgeous as the mountains are