Turned out really nice man ;)
How is everything going with the AFC? Idle fixed up yet?
As for ProECU, here are some prices..
Wideband 2E0 $514 (http://wbo2.com)
Conversion Harness US$85 (http://www.jkobd.com/index.htm)
New Ecu - $200-$300
Other Various parts $100
YES you dont 'need' the Wideband but each to their own mate