I am considering the Nexus 5 mostly on price and curiosity. I bought one from the play store with 3-4 weeks estimate, now it shows 2-3 weeks. I will keep an eye on Best Buy or Amazon to see if I can get one earlier (get charged tax at the Plays Store and Amazon).
I am on Verizon right now (unlimited data family plan), but am going to try the $30 T-mobile plan. I have an HTC Rezound which has seen better days (not eligible to upgrade until late June, or else I would consider the 6 GB plan being offered). I commute by 2 hours by train (each way) with no wifi. My charging port broke, and I have to swap batteries around 4 times a day. I also have two Anker external batteries, which I can use to charge the external charger. Although it is a bit much to carry around. According to Open Signal, my work is in an area of NYC which has no reception (the sliver around Turtle Bay).
I have been keeping an eye on Swappa, mostly for the Razr M, although not having a removable battery, I am not sure how the battery life is for the age of the device. Otherwise new, the Razr Mini and Maxx have caught my attention with the recent price drop.
I went into the Verizon store to see what is currently available. For personal size preferance/in hand feel I would order the devices: Moto X, LG G2, HTC One, Droid Mini/Droid Maxx, Note 2, S4...
I went for the 16 GB since it would end up being around $395 for the phone. If I went for the 32 GB, it would be close to $500...that would make it a tougher choice in terms of compromises (supposed battery/camera), compared to the Maxx (battery) and Moto X (i like the idea of Active Display, although I would probably go 16 GB for this one also.)
I already have a Spigen Ultra Hybrid case and the T-mobile SIM. I figure if coverage is not what I hope, then I can sell the device for a small loss on Swappa, and then buy one of the above phones for Verizon.
I am currently testing Sprint 3G/4G Mifi with FreedomPop (although it does not pick up LTE), and the coverage leaves much to be desired. My Rezound drops signals in a couple spots, but the Mifi is useless in many more. It serves as a good backup though (for a few dollars a month).