Charlie,

Congratulations with your new monitors. I have heard great things about the JBL's. And your statement that you can actually hear where each and every instrument is located on the virtual stage is an example of what monitors allow you to hear.

Using virtual instruments and/or loops or RealTracks for that matter are no reasons for not paying attention to the acoustic profile of your room. Whenever you make sound in a room, that room acts like the body of an acoustic guitar. Some frequencies will be absorbed, others will be amplified.

You could check audiominds.com to get a starting point.

Mike
www.mikewever.nl