I'm looking to get a treo to replace my phone and old Palm, but I have a dilemma. I can get a 650 from Phones*****.com but it'd mean changing networks from Vodafone to Orange (which my gf would prefer I didn't do, since she's recently renewed a contract with Vodafone, and would like me to be on the same network due to free same-network minutes). On the other hand Vodafone have also just started carrying the Treo 750. However, it runs windows mobile, which I think would make syncing more difficult with my Macs and would pose problems in bringing data forward from my old Palm. Would it be possible for me to install PalmOS over Windows Mobile, either now, or in the future? If not, I think I'll have to go with a 650 on Orange. Also, I've heard that the 650s crash quite often. What are MR users' experiences?