Nexus 7 Doesn't support Micro SD card
As i am saying again that both android and Wp os are differnet there requirement is different even a windows phone or Ios can run smoothly with out any lag on 800mhz pro and 256mb ram while android will lag a lot even with OCTA core. so it will make a difference how good lumia touch is it but nokia said they have used same super sensitive touch which can be used with glooves they have implicated same technology in 520 :P. As 520 is better then 620 the only thing its lack is flash and front camera.
I still said look at the difference windows phone can run perfectly smoothly at single core processor. Rest its OP choice most member i have seen said even the whats app is not customized for windows phone its uses a lot of battery and make the phone to heat up.
As ram is consider Microsoft haven't implicated that at least 1gb ram must for next update or any app which required greater then 512mb to run.
There is point to shoot camera to squeeze down in you pocket
add 8k and get and nikon s2600
total 20+35+8= 63k
P.S i respect your opinion but i have just one concern is the price i would have been paying is not worth it till now don't know about the future. when i have so many other options available.