There's that holding company called (Global Brands) that owns some ghostware brands and I bought a 10-pack of 90min tapes from them, I think that cost me $2.20 each, but the more you buy the lest they cost. I'm testing those out now, and they seem to be good. Also, according to the tapeheads forum they're bias-compatible with Maxell/TDK, which I believe since they sound the same as my Maxell tapes.
NAC tapes are BASF super chrome, what that means to me, I'm not sure, but at least they have 60min tapes, which I'm sure would be better in the long run for multitracking.