> (the "anything mini" line of phones are crippled, all of them)
If you wait until the new year, you might consider an Zperia Z1 f. This 'f' variant has a 4.3" screen, but the same processor and 2GB RAM as its bigger Xperia Z siblings.
I have a 4.3"-screened Xperia P, and whilst being far from state-of-the-art it ticks along quite nicely on a dual-core chip and its copes with HD video and 3D games happily enough- though I seldom ask it to. Good call quality. Battery life could be better. Small text is readable on websites, but I imagine a bigger screen would make browsing easier. I would hesitate to recommend it to anyone with poorer close-up vision or 'sausage-fingers' though.