I too am using the Salamander Synergy tower rack. It is expensive, but so isn't what's inside. I just finished "loading" it with all the new gear. I have a 20 Base Unit and a 40 Extension sitting on top of it. The 990 is on the top shelf of the 40 which is a reinforced shelf (by design-nice touch) and the 7500 golioth is on the very bottom shelf of the 20. I have cd changer, dvd player and turntable along with the 990 in the top 40 extension. Above the 7500 on the base unit 20's upper shelf is a second zone amp and the Panamax 5100-EX power conditioner.
I did get the back panel extension for the upper unit. Without it, the cables (balanced interlinks) will not fit in the normal cabinet depth-something to consider at an extra expense, if you want an enclosed cabinet. I can't fit the base unit 20's conventional back panel on, now that the power conditioner is in the lower area. The Salamander web site is a wonderful resource and you can design your system on it. You'll have to find a dealer in your area though. Hope this helps.
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990, 7500, Pioneer DV-45A, Boston Acoustic (BA) VR-M90 Fronts, BA VR-920 Cntr., BA PV-1000 Sub, BA VR-MX Surrounds, Pioneer Elite Kuro Pro 151-FD Plasma, Panamax MAX 5100-EX, Salamander Rack.