I think your comment above is spot on John. Because compared to any RL driver then we are missing so many visual, auditive and plain physical inputs that anything that is able to compensate a bit for that will probably raise the imagination for most. As an example I would rather have a lot of directive transmission noises/cues in my virtual cockpit than none - even if the RL driver in the car I drive dont exactly is able to hear the transmission noise above some engine or cockpit rattling. ByTheWay: Having a dedicated sound card does also help to destribute the available sound cues. Because with a dedicatede SC its often possible to tweak the sound destribution for the speakers or headphone better than if you just have some low end semi-SC integrated on the motherboard.