I never shot a Satori , Only in metal have some expeirence with that Discovery Samick 21"/ 17" and WF19 and WF21 " risers . If I was lookin at the Satori I would lean towards the 21" model . Just like in Samick imo there 17" riser is there bread and butter riser . Seems like the Samick 21" riser has not taken off as there 17" model , and I have and owned and shot a bunch of Samick stuff and there ilf limbs ( awesome for the pricepoint ) in no way badmouthing Samick . Check with Johns custom archery gear , he runs really good deals on Satori risers when he has them . No expert here just a hunter , my favs are CD Archery WF19 and WF21 , which I own both . What ever you choose something like in marriage contract agreement " Buy once cry once " !