Thanks to all that have replied.
The general consensus appears to be that most are happy with the available rack offerings.
I posed this question on the forum based on my own experience.
The blue bike pictured below is a Bruce Gordon Rock N Road with Tubus racks and a pair of Beckman panniers.
The red bike is my new Co-Motion Siskiyou with Beckman racks and Beckman panniers.
On a side note: If you're tired of maintaining chains and derailleurs while touring, I highly recommend a Pinion-based touring bicycle. Yes, they're a bit heavier and a bit more expensive, but the lack of maintenance and worry is worth it to me.
The pictured pannier is the back of one of my Beckman Panniers. I have modified it from the original by installing an Arkel quick release mechanism that is all metal. I also added to substantial J hooks that go over the bottom rail of my Beckman racks. The combination of the locking Arkel mechanism and the shock corded hook ensure that the pannier will never come off the rack. The two bottom J hooks ensure that the bottom portion of the pannier will not flex or flap away from the rack. The Arkel system and J hooks are attached to a 1/8 thick aluminum plate that is inside the pannier. This is a bombproof setup.
I have found that the limited rack support area on the bottom of the Tubus racks allows those panniers to flex and move around more than the all Beckman setup. Hence, the Tubus-based setup imparts more movement into the frame of the Bruce Gordon which can affect the handling. Yes, the tubes on the Gordon are thinner than the Co-Motion, but when I had the all Beckman setup on the Gordon, it was more stable.
Hence the Tubus setup is not as stable as the better all Beckman setup. Yes, the Beckman racks are heavier, but testing done by Alee over on
www.cyclingabout.com has proven that the overall weight of the bicycle really doesn't affect your average touring speed. So, I agree with Alee, that the overall weight is not something to be overly concerned with. Anyway, we are not racing on these touring bikes.
John Nettles is dead right about the security of the Beckman bags and racks. With multiple support hooks on the top and bottom tubes of the Beckman racks, the bags are very stable and secure. All other bags, from my experience, just have two hooks on the top and then a small lever or nylon strap with a spring that attempts to keep the bottom from flapping around. I have seen other bicycle tourists bags flapping and moving around which does nothing to help the stability of the rack and pannier system.
Another short coming of most racks is that the bottom portion is quite narrow and does not allow a good support mechanism to tightly hold that portion of the pannier. The bottom portion of better racks are wide to better allow this type of support.
Of course, the bags and panniers have to be compatible and the industry standard is the two hook and lower stability lever. I personally feel that that is not the best way to do it, but I can't change the industry. I too have used that system and it worked just fine for me, but wanting to be a closet engineer, I am always searching for something better and found it in the Beckman system.
Since I am now retired, I may teach myself how to braze 4130 chromoly tubing and build or modify a set of existing racks to my desire.
I have worked with a custom frame builder that modified my Beckman racks further so that I could use a Decaleur bag rather than hanging it off the handlebars. That custom work, though not cheap, worked out perfectly.
Thanks again for all the replies and your generous input.
Keith