IMHO
If your not a DIY stay away from the flexy rack.
If you want rigid stay away from the flexy rack.
If you have time and want to save$ build a flexy rack. Just keep it short and use 3/4in rod and at least 3/4in cabinet grade plywood (comes in Oak, Birch, Walnut... veneers)
I just completed a flexy rack last week for my TV, VCR and DVD. I kept it low and wide (24Hx80Wx20D). I used a combo of 5/8 and 3/4 Zinc rod and 1/2 and 3/4 Birch plywood. I spent a few days sanding, staining and finishing the wood to look nice. I painted the rods flat black, but it flakes easily. It turned out nice and I got thumbs up from my wife too! However, for a great looking equipment rack, I like the Salamander line. But the price keeps me away. The anodized extruded aluminum strut material they use is awesome. If you want more strength and vibration control try this http://www.zoethecus.com/. LOL!