I have trouble with my neck area, too. I am a straight user and have a ton of years in DE - so your problem isn't new to me. I find myself using the DE occasionally to criss-cross my neck to get the stubble out. I'm beyond nicks and cuts and ingrown hairs for the most part but I still work on the hard parts to get a BBS. Sharp blades and a bit of care does the trick for me.
Prep, to me, is more important than the shaving soap. I often use crazy stuff just to prove that the soap isn't the main ingredient. I use regular soap (Ivory, Zest, Dove, etc) on occasion. I also use MWF, Cella, KMF, Cade, and all the others. I prep with hair conditioner and before that a warm face splash with water. Keep it wet.
Inventor of the world's first safety vibrating Kamisori with night light. Go to http://badgerandblade.com/vb/showthread.php/299465-A-milder-Kamisori: Inventor of the Weckisori - (thanks sychodelix)