there is no perfect phone. the one X won't be good in gps reception, as to all aluminium built devices. even if there is a plastic area designed to place the gps receiver (e.g. the apple logo on apple devices), they aren't as good as completely plastic casings. all i can say is, prioritize what u want first, if smoothness + user friendly, it's either the galaxy Nexus or the htc one x. if u want budget friendly, u can now get the sgs2 from digi with plan for 899. then update it to ICS, it will be a vast improvement from gingerbread, especially smoothness and responsiveness.

overall i'd say the nexus is your best bet. it will retain it's value much better than any android phone out there.