As a Nexus 5 owner I always thought that was a good size and the Nexus 6 to big.
Just spotted one in HM today. The 32G model for $1199 IIRC.
It is a big phone to be sure but now having actually handled it out doesn't seem as big as I had thought it might be based on dimensions.
Probably won't upgrade but is not an impossibility now. The main issue is how to carry such a large phone when it probably won't fit in my shirt pocket.