Exynos is great! i mean it. best performance ever! but long term support for software updates, i choose HTC. Even if its late, its a good and reliable update. I used SGS2 and the initial release of ICS updates are so teribble(need many leaked firmware and updates to make it right). Samsung always "almost" abandon their previous flagship when they have new flagship device. SGS1 didnt even get ICS OTA even if its almost the same spec as Nexus S.

Well this is speaking for official updates, those who use custom rom you paham me already. no need to worry so much lah. only wait for source code release and we are good to go.