New phone quandary

I have decided that it is time to start looking for a replacement for my Samsung Epix (WM6.1 on AT&T). Below are some of the alternatives and the pros and cons. Some key overall criteria for me are:

• Ability to tether or act as hotspot, so I can connect my laptop to the Internet if I have an urgent need.
• Exchange server sync for email, contacts, calendar and preferably notes
• Voice control (primarily for dialing) via Bluetooth
• GPS
• WiFi

 

Verizon HTC Droid Incredible
+  Android market, Verizon coverage, Skype
- only 3G, no simultaneous voice and data
Verizon Palm Pre
+ Free hotspot software & service, WebOS opearting system, cheap ($49 on offer)
- Hardware over 1 year old, no simultaneous voice & data, limited apps market
Sprint Evo 4G
+ Android market, Wimax speed in limited cities, large screen (4.3")
- Simultaneous voice & data only in 4G service area
AT&T iPhone 4G/HD
+ iPhone apps, simultaneous voice and data, possibly tethering (expected with release of new iPhone), HD screen?
- probably not 4G but UMTS 3.6 or 7.2 Mbps
Google Nexus on AT&T or T-Mobile
+ AMOLED (bright) screen (works well in sunlight), sunsidized via T-Mobile, UMTS 7.2Mbps
- AT&T version unsubsidized (=expensive)
T-Mobile Touch Slide
+ HTC Sense UI, physical keyboard, UNMTS 7.2Mbps
- Sliding keyboard, so probably thick

 

Other alternatives are to wait for Windows 7 phones, but I think Android and iPhone have far superior apps markets, or other Android phones, coming out in the next few months.
T-mobile has a very interesting capability, UMA, which basically allows the cell phone to use a WiFi network like the GSM network. The advantage is that you can use WiFi when traveling abroad without having to incur costly international data roaming charges. Your phone opeartes anywhere in thw orld as if it is on the US network. This is very good for the few, short trips that I make abroad. Currently UMA is only available on Blackberry smartphones, but there are rumors that T-Mobile will be bringing out an Android app later this year.
AT&T has the 3G voice and data micro-cell, which allow me to overcome the poor reception in my home.

 

I am sure that I will think of further benfits and issues, and will add them as comments to this post. Feel free to add your suggestions of things that I may have missed.