I'm assuming the supercharger is not stock, right?
The boosted cylinder pressure will increase crank bearing loads, particularly at low RPM where the reduced shear velocity means reduced oil film thickness. Personally, I'd go with a thicker oil to help restore this lost safety margin. If running Conventional, one of the 15w40 truck oils would work well; they tend to be inexpensive to boot (Very little advertising to pay for.) For Syn, I'd consider just about any Xw-40. I don't remember ever seeing PP thicker than Xw-30, so I'd probably give that a pass. There are several flavors of Mobil 1 widely available, as is Valvoline 10W40. Mobil 1 15w50 comes to mind too. It's got extra zinc/phos and is, AFAIK, well regarded by gear-heads.
Redline is fantastic oil, blended by a small US company. I support them when I can, but also understand that $10+ a qt. adds up in a hurry!