You could pick up the Nexus 5. I switched to OPO from Nexus 5 and it had the perfect dimensions. Lightweight and great for one-hand usage. The battery is a bummer though.
The maximum screen size I'm looking for is 4.5 inches, maybe 4.7 if the bezel is very thin. Maximum weight: around 120 grams.
The Nexus 5 is bigger and heavier than that, but I'm keeping it near the edge of my radar in case I have no other choice.
<rant> LG recently began to market the Gram, a series of high-end ultrabooks that weigh less than 1000 grams. Why on Earth is nobody trying to market medium-to-high-end phones that weigh less than 100 grams? </rant>
