Low-cost options which preserve maximum flexibility to "do it right, do it better" later, along with a real-time on-the-fly matrix-
Buy a Tascam DR-70D and record 4 individual channels separately, while sending your 2-ch on-the-fly matrix out to your R-09HR. The DR-70D provides delay as well as pan and level control over the stereo mix.
Buy a DR-680 and record up to 6 individual channels separately each as well as your 2-ch on-the-fly stereo matrix simultaneously on the same machine. The DR-680 provides level control and pan but no delay.
Not sure if the 70 offers EQ per channel or channel pair, I know the 680 does not.