Originally Posted by Fighting Nafs
If I'm not mistaken, you live in the UK?
You can look at Amazon but I don't think their prices will differ from the Play Store (yet Amazon has a reputation for fluctuating prices).
As for getting standalone Wi-Fi or LTE enabled N9, that's up to you. I'll share w/ you my perspective so that it doesn't sound overly technical, and hopefully you'll come to an understanding.
In the U.S., if I were to buy a N9 w/ LTE, I'd have to add it to my existing AT&T Mobile Share Plan. So, there is $25/device + $10 for access to my data plan on a monthly basis. You see where I'm going with this? Cellular network access and data allotment pricing may vary in the UK (which I understand has more reasonable pricing in comparison to what major U.S. wireless carriers offer- well T-Mobile in the U.S. is trying to entice Verizon's and AT&T's subscribers). So if you opt for LTE, you'll have to consider paying monthly for LTE access on top of the purchase price of the N9.
I see that you're pretty much in favor of the N9. It's a pretty good choice b/c it's the first Android device using Nvidia's 64-bit processor and a 64-bit Android OS (other than the iPhone 5S and newer having a 64-bit SoC, other Android phones don't have 64-bit chips). Nexus devices get Android firmware updates first. The OEM's issue Android updates much later because they have to make sure the updates are compatible with their custom apps and proprietary boot loader.
IMO, I would stay away from Samsung, Sony, LG b/c they seem to add fluff, no substance, and your money will be going to their hefty marketing department. If I had to buy from an OEM, it would be Asus, Lenovo, Toshiba (may be), or Dell (at the right price), and their tech support is pretty good.
Don't worry, you're not bugging me. I welcome your queries. In fact, I'm getting good practice in trying to communicate in simpler terms rather than bore you with technical jargon of computing and business.