Not sure what your max budget is, The ECCI PR100 isolates quite well and is one of the best performers in the sub$25 range. Edited: I just checked that the HJE120 cost about USD6-10. At that range, I would say just go for it. If not, I think you can try the Kanen KM92 wooden in ears for about $4.
11/6/10 at 10:04pm