No, I wouldn't. And to put that in context, nearly every electronic item I bought since my Walkman in 1984 until about 5 years ago was a Sony. My TVs have always been Sony. My stereo equipment is almost exclusively Sony, and always has been. My computer monitors were Sonys until they exited the business. My first 3 cell phones were Sonys, and they were great.
But these Sony phones are competing with Nexus phones. I want my phones to be unlocked, affordable, and have FAST OS updates. I'd pay a bit more for a Sony than, say, the LG Nexus 4, because I'd rather have Sony hardware and build quality, but I won't pay double, and I won't buy a phone from a company that doesn't make OS updates a TOP priority, and for at least 2 years from release.
I've always liked Sony, but the game is different today, and to ME, at least, these things matter more than the company brand. I also prefer STOCK Android. I could probably live with a custom launcher, but not at the expense of delaying OS updates for 9-12 months.
I get why Samsung uses a customized Android; products like the Note series and even the SIII had some hardware and functionality that wasn't yet supported by Android at launch, but most companies go much further than they need to, and thus make OS updates more difficult, expensive, and delayed. To me, that's CHOOSING failure instead of success. No one buys a phone BECAUSE it has a customized Android, only IN SPITE of it. They buy the phone for the hardware and the Android/Google apps.