NBS Classic vs. Monitor vs Omega Series

Hi, Has any one here ever listened to and compared the differences among NBS's Classic line versus its Monitor and Omega lines at the same price levels? For example, how does a Master 2 compare to a Monitor 2 or an Omega 2? This applies to interconnects, speaker cables and power cords.

Also, any knowlege of differences among Classic I, Classic II and Classic III products will be greatly appreciated. For example, is a Master III better than a Master II? If so, is its performance closer to a Professional II or Statement II?

The NBS website provides very little information, so it has been difficult to do much research on these topics. Thank you in advance for sharing your knowlege and experience.
Thanks a million Jazzhelp!!! This is most helpful. Based on you input and what I have heard, I think I have a better feel for the differences now.
Walter is a great guy, very cooperative and understanding he may be willing to let you swap and audition cables give him a call you properly can work something out.