You need a whole new set up if you want your locals in HD. They are located on 61.5. Dish is converting everyone to either an eastern arc or western arc depending on where the HD locals are located. So you will need a brand new dish. If you sign up for auto billing you can get HD for life. The 222 does not support an ehd as far as I now. You most probably want a 722 which has 2 sat tuners and 1 ota. The k model adds a 2nd ota tuner with a added module. There is no fee to add an ehd. DVR fee is $6/mo. If the 2nd tv is also HD you could add a 211 for that one and pay a 1 timer per account fee of $40 to add an ehd which would give you dvr like functions. If the 2nd TV is an hdtv, ty can hook the hdmi from the 211 to the tv and run coax from the 722 to the antenna in. That way you can watch true HD and anything recorded on the 722 on the 2nd tv.
AFAIK, there is no real reason ot own your equipment if you plan to stay with Dih for 2 years. No difference in fees, etc.