Well, the title explains everything, but I still want to elaborate. As far as I know (please correct me if I'm wrong) all three have near-infrared sensitivity and can produce IR effect if used with 720 nm filter (that's what I'm about to use too), but does anyone here have experience with all three films and can suggest which one is the best? I was about to go for Rollei IR400, but they are quite pricy and almost always on backorder. Rollei superpan 200 on the other hand is significantly cheaper, always available, but I'm not so sure about its advantage over IR 400. And as for Ilford SFX, it also has a substantial price tag and I'm not a fan of Ilford. I'm confused and can't decide, so any objective opinion is very welcome. P.S. It's going to be a 35 mm film, not medium format, if it matters for the subject.