Apart from the HERE services, which have been released for all devices in some countries already, I really don't see that much value in Nokia's exclusive collection. They seem to be either the kind of apps that you either need or don't need, or games that personally don't excite me.I went for an 820 and don't regret it at all. Good screen size, compact design considering and similar internals to the 920. Slapped a 64gb SD in and very happy. Wouldn't go for anything other than a Nokia due to their support and bespoke apps.
But I am impressed with what Nokia is doing on top of Windows Phone, such as the upcoming double-tap to wake and standby clock. Despite the fact that I am highly disappointed in HTC for backing away from its "signature" devices, the 8X may very well end up as my choice if I can be adequately convinced that HTC is going to roll out future OS updates, and on time.