I find the Table Saw does not generate that much dust (contrary to what I've heard/read many people say) - perhaps I just don't see it; however, the Router is a dust machine. The HF Dust Collector (at 2hp) should support both your TS & RT - install blast gate, and open only the one you're using, though, much depends on length and bends within the 4" pipe, and whether the pipe elevates to the garage roof, then down to the fan: I've run mine along the wall, about 2' above the floor. I've spent considerable time trying to optimize my 1.5hp Delta DC. The Dust Deputy has significantly helped by shop vac; for the main DC, most dust & chips are removed from the air stream mid-way between my equipment and the main DC - this helps keep the air flowing.
The 3-1/2" drawers are a great height - my current build (I'm building one in the shop) will have mostly this size, with two 8" drawers for other things.