I am nervous about the Saitek Gages and Control Panel. In particular all those USB connections. But, I'll use Powered USB Hubs as I described above and that may make things run OK. I've used the Saitek Yoke, Throttle Quadrant, and Rudder Pedals before with good results (and the price is right), but I have no experience with their Gages and Control Panels.
I have only used Saitek readiopanels, backlit info panel, multi panel and throttle quadrants. As I said the radios were hard to pin to exact frequency. The backlit panel is great and the throttle quadrants too. I still have the quadrants and the backlit panel. Others are sold.
I am using a gang of the saitek quadrants as my boeing throttle and I will use the backlit panel for my king air panel. I have no clue about the gauge panels, but I have seen that one can customize them to different models. I hear you on the USB thing, but in most cases powered hubs can run at least four panels without issu. I have read from GoFlight website a suggestion that Belkin USB hubs are reliable.
I like the idea of building cessna. I have also plant to make one in the future. I think I am working on my sims in a strange backward way. Twelve years ago I started the boeing, continued a second project with king air and as I still have CH Yokes, CH quadrant and CH pedals I am contemplating building a Cessna after I finish the king Air which is close to be finished. Mostly I don't rush to finish them as it is a work in progress and I love the process and the illusion that I have something to do. As someone said to me, I will be lucky if I get to finish them before my wife murders me. But I am very grateful of her being understanding.
Below are some pictures ...