Terrific hardware and benchmarks alone don't make a terrific phone - one of the key takeaways for me from my exp with XSP.
Good optimised software by the OEM matters a lot to the user experience. I am 100% sure that with support from Sony for at least until the release of Kitkat could have made a huge difference now.
I rooted and flashed a new ROM on my phone approx. 6 months after I bought it. I was frustrated of the Stock ROM with so much lag and bugs after prolonged use.
But after using custom ROMs for almost one and half years, I miss the Sony UI. Every custom ROM (except for few) have the same old bland interface. I got sick of it to be honest, even though custom ROMs have better performance.
Next is the camera performance - another let down for me. Same goes to the phone speaker.
Well, what are your thoughts on the XSP before you go and buy another phone?