I've used E-Z Line for while now and sure love the stuff. Then recently I found Uschi Rigging Line and bought some. Very much like E-Z but, it comes in even smaller size which is more in scale for 1/72. I have yet to use it but, it will be on my very next kit. Appears to be dynamite line.
Here's the homepage:
http://www.uschivdr.com/products-in-detail/rigging/
Joe: I believe that the fine E-Z line would be suitable for 1/48. It's a tad bit large for 1/72 in my opinion. The medium size might also work.