I got turned on to Polymax SW here, on APUG by Alex and I am hooked on it. I have a whole unopened box of MGIV because whenever I start to run low on Polymax, I just gotta order more. Killer Blacks and delicate highlights in Dektol. Neutral in tone. The 'F' surface is great, a nice gloss with a paper texture. Just beautiful when dry mounted.
Try it, see how it works with your negs.