When I opened for DJ Dan a long time ago, he played a whole mess of Umek/ReLoop tracks amidst the big disco house. That says something right there.

As for Picotto, his stuff is usually hit or miss with me. He did an awesome track called Pegasus a few years back, and his Athos 1 stuff is pretty good (especially that Brandy J Kat track on the Primevil EP). However, I've heard some tracks of his considered "techno" and they were straight up garbage.

DJ Preach from Montreal is pretty good at working serious crossover material, and it's usually quality. That "Stars" EP he did is just right for a clubby slot in your set, whereas I've heard a lot of trance DJs bang it as well.