I know its overplayed , but i think Moto Metal 951's will look great with the amount of chrome you have. Hey they are over played for a reason
20x9 MM951 5.71 backspacing
and an aggressive 305/55R20 A/T
I wouldnt go with chrome monsters , i think they look fugly in chrome.
as Hash said the XD Hoss would look good in a 20" as well