Vanillalite
Ask me about the GAF Notebook
IE9 was never an issue for me. Every site I visited worked well. Speed difference in rendering is obviously there, but it never really bothered me to begin with. It doesn't matter to me if I have to wait 5 seconds or 8 seconds for the browser to load GAF (lol). But what do I know, I don't like Chrome and use Dolphin, because I like the UI much more (just like on my iPad).
Also, you got a phone with Sense, you opinion isn't valid anyway.
IE9 is better than IE8 in this regard, but IE9 still has it share of weird site design handling in terms of rendering. Plus actual browsing is just more responsive on pic/gif/vid ton of crazy CSS/html5 sites. So it's more than just load speed. Plus I love syncing settings between my phone, chromebook, windows, and ubuntu.
Plus it's nice to have browser options unlike WP and iOS. You don't like chrome, but easily found something you like. Heck I have Chrome, Firefox, and Opera as viable options.
What do you know though. You hate my HTC device, but I'm not the one with lame pentile matrix super amoled display.