T-Mobile's version of the Sony Xperia Z is now available on the carrier's website in both black and purple. We were previously under the impression this was just the pre-order date, with wide availability following tomorrow, July 17th. The device appears to actually be ready for purchase, though. If you jump on it now, you get free overnight shipping and a Sony Bluetooth wireless speaker. These are limited time, online-only offers.
You're looking at a cost of $99.99 with $20 payments over the next 24 months (or whenever you pay off the remainder). If you want to buy it outright, that'll cost you $579.99. The Sony US store was previously selling the device at full retail price with a ship date of 7/17. So maybe T-Mobile is taking regular orders, but isn't dropping them in the post until tomorrow.
The Xperia Z might be a few months old, but it's still a viable device. The Snapdragon S4 Pro is pretty fast, and it has 2GB of RAM. The 1080p screen doesn't have the best viewing angles, but it's clear. There aren't a ton of high-end smartphones that are water-resistant either. Maybe you'd like to use the Xperia Z for a while, but don't want to commit? Well, T-Mobile has started offering Jump. Just a thought.