Can’t really attest as to the Red Dawn’s sound as compared to Goertz. ...I CAN tell you that I like the Goertz sound in the systems in which I have heard it.
Goertz is an excellent $ to performance product. ...Especially when compared to other “high-performance" cables often costing twice as much. Here on AudiogoN Goertz can be bought at exceptionally good prices - through dealers or second hand through members.
One definite consideration you should make re: Goertz would be synergy with your amp/speakers – due to its (relatively) high-capacitance design. How much (if any) increase in capacitance would your system see with a move to Goertz (at 10’ lengths)? ...A significant increase in capacitance might create sibilance that you don’t currently hear. ...Additionally, some amps such as Naim have problems with Goertz & will actually shut down if used with.
Also:
Are you using long speaker cable runs instead of long IC’s?
If you have separate pre and power you should seriously consider running longer IC's and shorter speaker cables (if practical). You’d set up your power amp at the speaker end of the room, then set up your pre, sources etc. at the other. The benefits of doing this are numerous. If you went this route you might also consider running balanced cables (if your gear is equipped with these inputs/outputs) ...you might even NEED to.
In addition to better sound, longer IC’s/shorter cables would likely cost less (than the other way round). How does your price for Goertz compare to the Red Dawn's?
...Just my .02