IMO the hd2 is a very nice phone. but winmo 6.5? that just looks horrible, now winmo 7 might be different. but it is said to have a ui similar to the zunes which IMO looks like a spiced up (nothing special) 6.5 ui. dont get me wrong i like the zunes ui but not on my phone. i had a dash 3g running on 6.5 and it just looked horrible, thats all i can say about it. i know the hd2 is a lot different that a dash but it gives you a sense on what wimo is like.
google and apple are going to war. that means huge updates, and huge advantages. i think google will crush apple, and as we have seen thats hard to do, so i think they will do some major updates and upgrades. but again thats jut my opinion.
i also think that the hd2 is to big, it might not sit tight in your hand, hard to press buttons or the srceen a mile away with one hand, multi touch will be like exercise, and if you look at it wrong the screen will crack.
i just would not want my phone looking like this the first time i drop it,http://techielobang.com/blog/wp-content/uploads/2009/12/htc_hd2_glass_cracked.jpg
but if you like winmo, dont care about android updates, put your money into hopes and dreams (windows mobile 7), or just want to be the big kid on the block the hd2 is for you