I'm in the market for a new case and I've been looking at the Corsair 800D. My current case is the Antec 900. I've had some experience with the P183 and really liked how the doors were sturdy and felt substantial, unlike the thin, flimsy panels of the 900. Can anyone with experience with both the P183 and 800D tell me how "substantial" the 800D's side panels are? Much appreciated...