HTC HD7 Windows vs iPhone 4 iOS from a mac viewpoint

First of all, let me put my cards on the table, I like mac stuff, I have a MBP, iPad, have has numerous iPhones, apple TV etc you could say that Im a bit of a mac fan.
Hell I even have some apps on the app store.

I picked up a HTC HD Windows mobile 7 at the weekend, purley based on the fact I really want to develop apps for it.
By day i work building .net applications so It should be something I need to look at, so I thought I would have a dabble.

What I wasn't expecting was to be so impressed with it.
So let me give you my first impressions and where I think its good/ bad

The Hardware
Yes its a big phone, but in all honesty this is all taken up with the screen real estate, its a little bigger than the andriod HTC desire.
First of all it feels like a well put together device.
One thing I do like is the built in stand, which is housed on the back of the handset.
However one thing I feel lets it down is this is also where the speaker is aswell, so to use it as a music / video player, I would say external speakers are the way forward.

The UI
I think until you have used the UI and how it fits together, theres a real chance you may not get it, maybe its like marmite for some people.
However I think this is one of the best bits of the phone.
I have been able to add albums, people, apps and other bits and bobs to the homescreen, this i like alot, however they will be faced at somepoint with the same dilema apple had, how to put alot of things on the home screen.
I also love the way some of the squares animate with little details.
Latest facebook status etc.
It just feels well thought about in that respect.


App Store Vs The Market Place
I wasnt expecting much from the Market place, however i am impressed how many apps there are at launch, so I suspect its only going to get more.
Alot of apps on there are on the App Store too, so some were farmilar.
I do however like the fact you can install the app and try them first before buying.

Music Integration
Lets be honest in the past MS has pretty much insisted that you only use Windows Media Player, so I was expecting a bit of a nightmare to get my music on to the device.
With a mac you can download a beta sync software, which allows you to sync from iTunes, music, videos, podcasts to the phone.
The only issue I have found so far with this is everytime I sync it erases then reloads everything.
However its still in beta, and may be fixed soon.
It was alot less painless than I expected.

Contacts
So far I think ive been quite positive about it, well heres my only real gripe and a bit of a showstopper for someone who uses a mac.
Unless you have all your contacts in Windows Live, then its a bit of a nightmare.
I have managed to add contacts to google and put them on the phone that way however.
Also since I have windows live and also put my facebook details in.
I now have a contact list that is massive and full of duplicates, which lets be honest is rather annoying.
There is an option to link the contacts together, however this isnt what I would need.
There is no option to pick and choose what is sync'd from what source, and to me that seems a bit of an oversight.

So to sum up, as a bit of an apple fan boi, I have to say I am quite impressed that they have made such a good job of this, I think in future itterations of the UI it will only get better.
I do feel the bar has been raised and feel its making the Apple iOS UI look a bit dated.

Is it an iPhone killer, it has the potential to be, however it would need that killer app for me.

I hope that helped answer anyones questions, feel free to ask if you want to know anything specific and I will try my best to answer