Canon HV40/Sony FX1 for music video. (slo mo thoughts)

I'm shooting a music video that will incorporate some slow motion but also some really jittery hand held type stuff. I own a Sony FX1 and also the Canon HV40. I want to somehow use both cameras if possible.

Would it be more beneficial to shoot the entire video in 60i on the canon so as to get the nicest possible slo mo and then convert everything over to 24p? Or should I shoot in 24f and then just use the FX1 for shots that I know will be in slo mo?

converting 60i footage over to 24p, will that essentially make it "look" like 24p in the end? I want to avoid the home video look at all costs but I realize shooting in 60i will give the best results for slo mo.

Thanks