Been through the process already, so don't know what my n=1 is worth, but I would consider auditioning at stronger places, with your step score, provided there are no personality issues, you should be able to match well. I wouldn't even consider the DO programs, and depending on how many audition months you get, I'd spend 1 at a reach where you want to go, 2 at some semi safe spots, and 1 at some place that has historically taken DO's in the past.
I would rotate at the reach program early in the cycle so you can secure a solid LOR by the time ERAS opens up from a well-known faculty member. IR rotations tend to be nicer since you get to interact and have more hands-on experience instead of sitting behind a resident possibly annoying him/her all day. Some DO Friendly programs that come to mind: if you're thinking FL, Mt. Sinai Miami, USF, UF Jacksonville come to mind. I'm not familiar with the Illinois programs but can't imagine it being easy to break into Rush, NW or UChicago. There are tons of stronger programs out there that are receptive to DOs that I think you should consider looking into.
DO's have matched into Radiology with far less than you, I wouldn't worry too much about it. Apply broadly (aka everywhere), do your research on programs which have matched or interviewed DO's in the past (and even if they haven't, you could be the first, who knows?) and try to be as personable as you can on your interviews and elective rotations.