The HP+'s squeal pretty bad and are REALLY hard on the rotors. The HPS's tend to squeal as well but are a little more rotor friendly. If you used any of the race pad series, then you'll really have problems with squealing and dusting.
I have a set of PBR (Axxis) ceramics if you need them. They're new and never used. My plan is to use Porterfield R4-S pads instead. I'll give you a good deal on the new pads.