My personal favorite is the "Y" record on dirtstyle......each revolution of the record has a stab, drum sound, and sound effect at 0, 120, and 240 degrees around the record which allows you to find what you need very quickly based on what position of the label is in. It's still an open groove record (not closed loop like the dj swamp ones) but there's enough breathing room on each track to allow for a few skips. The Y record has a shit load of good sounds and samples.