Over the last few years the 9100 has been gradually replacing the 9000 series, support for the latter is being discontinued next year... http://solutions.3m.com/wps/portal/3M/en_US/OHESD-Survey/9100AirWeldingHelmet/. Just a heads up
The adflo is 'kin expensive new but your lungs will thank you. First google link to complete adflo system minus the lens... http://www.ukwelder.com/shop2/shop_index.php?page=speedglas_adflo
Flexview... i don't see the point personally but then my world is mostly TIG, grinding and welding are typically very seperate operations. At getting on for 3 times the price of the standard shell makes for an expensive grinding mask.