Which windows phone should I buy for wifi only?

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http://forum.xda-developers.com – OK, so I currently have a wifi aokp ics HTC flyer, iPod touch 3rd Gen jailbroken , hp touchpad dual booted with android and web os, and Samsung fascinate on miui 4 used only with wifi and has no plan of any kind, I bypassed activation. As you can see, I have a large collection of devices but do not have any cellular plans on them at all (my phone is a basic keyboard phone and I can't afford to pay 360 dollar a year data plan upgrade with Verizon, plus I don't want to worry about going over on data and being charged more). That being said, I want to try wp7 but don't know which devices I can us (HowTos)