I am in need of some flexible RCA cables of good quality.
I have been looking at Monoprice and Blue Jean cables, but they look to be a stiff cable which will be problematic for me.
Another cable I am looking at is the Belkin cables.
I have many old rca cables that I am starting to experence trouble witch is the reason I am going to replace them all.
Any insight into good quality flexible cables will be apreciated.

I am confused about the degree of flexibility that you are looking for. Are you talking about cables that are so flexible you could use them to for shoelaces (pretty much like the cheapies that come with every piece of electronic equipment that has an RCA jack)? Or are you concerned that the cables you described cannot make the bend from component A to component B if stacked upon one another?. If its the later, the premium Monoprice RG-6 based cables can certainly fold in half (with a bulged loop at the closed end).

How flexible do you need? The Blue Jeans cables I have are a little rigid, but not unmanageably so. The MonoPrice cables I've used were more flexible than Blue Jeans, but it depends on what you get from them - they offer all the way from decent quality down to the throwaway stuff that comes packed in with cheap DVD players.

Cabinet is only 21 5/16 deep.
Have an amp that is 19' deep.

Will be using all the pre outs and ins on the 990, which with stiffer cables is problematic due to space constraints.

All cables will exit left from 990, out thru 2
3/8 " holes and re-inter the cabinet thru 2 3/8 to the respective components There are (6) 2 3/8 holes, cabinet is divided into 3 section, left and right sections for components, center for Center speaker and lower drawer.
The two outside compartments are 4" deeper than center compartment..
There is a removable back panels on both sides , the holes for the cables are on the sides near the back.
Another option I am looking at is making my own , but still need help on choosing a good flexible cable compatable with the comnectors.

It sounds like the bigger problem is the diameter of the cables. How many do you need to get through each 3/8 inch hole?

I am looking for decent cables.
I do have a good number of Dayton cables which I have had some problems with, so I am looking for something better. The Dayton's are flexible enough, just poor quality IMO.

2 and 3/8th inch holes . The problem is not the size of the cable per se ,but flexibility of the cable. If I need more hole space I can always cut in another.

Use a hole saw to drill more holes. You can also put two holes parallel to each other and use a saw to connect them forming a slot. Either sand them smooth or purchase flexible banding material to clean up the cuts and you can make most of your runs with very little cable bending.

I did this on the "entertainment system" in the family room which is really a curio cabinet that is only 12" deep. Once I found components that fit I cut the holes and routed the cables. With careful planning you'll never be able to see the holes and slots.

Note: Most of my cables are MonoPrice.

I second EEman, matter a fact he took the text from my fingers.

Anything that tight will get warm anyway, the new holes will help with air flow as well as the cable management issues.

What EEman describes is similar to what I did with our cabinet. I created cut-outs behind the power amp and surround processor, and I have contemplated doing something similar behind the Blu-ray player since I am still hooking up my player via multichannel analog as well as HDMI.