<S> gpwurzel! That's a stand-up thing to do.
Saitek seems to be the only game in town with regard to pedals, but I'm wondering if I got the yoke + throttle quadrant, would I be able to purchase a standalone stick and use it with the throttle quadrant as my throttle if I tired of the yoke or wanted a stick in addition?
That throttle quadrant looks a bit more WWII era than the throttles that come with HOTAS kits like the Warthog, X-52 and X-55.