ARP 2600V software has not been a big problem with Pro Tools 7 for me. I increased my RAM to 2 GB and that Def. helps a lot with plug in's.. Pro-tools 7 is cpu hungry, but with either a very fast cpu and or 2 MB of RAM it works well.I wouldn't go beond 2GB RAM with windows XP. Also, clearing the clip board every few minutes has helped. I'm using a P4 CPU 2.60 GHz. There is a free update avalaible from Arturia for PT 7.