Buy Unlocked Z10 or Z30?

Question

I plan to purchase one or the other, eventually. Direct from BlackBerry, the Z10 is $300 and the Z30 is $500 (although the Z30 doesn't appear to be in stock at the moment). Those are great bargains from my standpoint; although, I assume that those prices stem from poor sales volumes. I'm just not sure which is best for me. I already have a PlayBook - which I'm happy with - so I have some familiarity with Blackberry. My thinking is that since I already have the PlayBook, is the larger screen size of the Z30 going to be worth the extra cash and larger form factor? Here are some factors to consider:
> I'm not much of a gamer, nor do I stream much audio or video.
> If I'm at home, I would probably do any internet surfing with the PlayBook.
> While I'm out, the main activities would be messaging, checking email, brief internet activities like checking an address, making a payment, taking a few pics, etc. And, of course, making rare phone calls.
I know the Z30 has superior battery life, but since I'm unlikely to engage in major battery draining activities, is that really an issue? Is the removeable/replaceable battery of the Z10 much of an advantage? Batteries degrade over time and eventually require replacement. What do you do with a smartphone when a non-replaceable battery no longer holds a sufficient charge?
Have I talked myself into going with the Z10? Are there any other factors that I'm not considering here? 

Answer 1

It's very interesting theme and You definitely have to think about it some couple of time. Difference between Z10 and Z30 don't lies at battery replacement ability only.
Z30 is far more "techy". It has USB OTG function; it means You can connect external keyboard and mouse and any kind of another USB device and it is possible to connect multiple devices when USB hub is used. Again, Z30 has Miracast function, it means You can connect large monitor or TV wirelessly.
Both functions above mentioned with appropriate software presents on BBW give you option to make wireless deal with Your PC remotely.
Also Z30 has FM radio which absents on Z10.
For me, they are very cool features but guess what smart I have? Yes, I have Z10.
Main Z10 pros are size and weight, and after I got both devices in my hands all questions gone, because I don't want to have some kind of spade for digging grass beside my house and I'm not teen with extraordinary size pockets to carry 5' device. It's big and that's all. I don't want it.
I forgot to mention: Blackberry's choice to make battery non-removable is clever idea: not battery limits its life but display type: Z30 has AMOLED display, i.e. organic LEDs. Time of their degradation for current technology is somewhere about 3 years