Was wondering if anyone here knew of quality white board markers. I do not like expo brand markers (cheap quality), these are for my personal use. I do not mind paying a bit more for quality. Ie I use tombow mono 100, lumograph, blackwings as my writing pencils. I remember a professor had a set of markers, that looked like retractable giant pens. They looked like good quality. When you where done writing you could retract marker tip. Thanks.