Be’emes, I think the real issue is whether you’re worried about the gavra or the cheftza.
The gavra is not an issue, l’fi pashtus, because an etzemdike yid who’s mamish considering being soiser his relationship with his friend because of content on an Ipod cannot possibly be tainted by as kleine a zach as an Ipod.
The cheftza, on the other hand (your Ipod), is mistama an issue. The repercussions, rachmana litzlan, of “non-yiddishe music” running within its veins (k’v’yachol) is not something to be sneered at. A heilige authority would have to be consulted before being matir such a geferleche matzav.
Because of the safek, I would be machmir.