I hear you. The upcoming Nexus 6 is simply too big. Don't get mad at me, I happen to agree with you. I don't think of it as an issue of hand-size, it's a matter of pocket space. Fitted pants and giant phones just don't mix.
So what's a Nexus lover to do? Pick up a Nexus 5. They're going for less and less these days. Today you can get one on eBay for $315 that will ship to nearly anywhere in the world. For whatever reason, residents of Argentina, China, Hong Kong, Indonesia, and Ireland are out of luck. In the US, shipping is free, though this isn't the case elsewhere.
This particular Nexus 5 is only available in white, and you only get 16GB of storage to work with. If that's not a deal breaker, then you know what to do. And do it quickly, because these deals tend not to last long.