[gambatte]

Well, to answer your initial question, WM6 offers native html email (pictures) and Windows Live as major features. WM6.1 offers native IE zooming and threaded text messaging. These features can be had in WM5 with the correct software so, as everyone is saying, it is strictly a matter of choice if you feel that these features are important to you. I have a WM6 ROM that works great and email looks just like on the PC. That was important to me.

The ROM will not ultimately determine if WIFI or Bluetooth will work but it may have some influence that we don't know (see posts where WIFI or BT isn't working quite right after upgrade). There is something else underlying your inability to connect to WIFI but more troubleshooting is needed. It definitely worked for me out of the box (WM5) and now with WM6 and I'm on Verizon. So, we need more info, e.g. can you connect to unsecured networks anywhere else? If you can there may be a router setting problem at your home for instance. The 6700 only does "b" protocol. My experience is that there is minimal settings that you can change outside of providing security keys/passwords for secured networks to connect to WIFI. You turn on WIFI and it starts to detect available networks. We would be glad to work with you to get your WIFI to work as it should.

Edit: Oh, and Activesync works fine also, USB or Bluetooth, and we can help there as well. Don't give up so easily!
Do you have all of the VZW upgrades to WM5?