Hi,
All of the IR covers out there are no where near as good as a dedicated IR light such as the Surefire M1 which uses a 10mw dedicated IR LED. The key here is dedicated, it's a TRUE IR light. There is so much light loss while using an IR cover over incandecent lighting. Using a IR filter will work for some very close in CQB work, and you will see the beam is not focused well, while the M1 iluminator will show great illumination out to 6o yards with no focus loss at all. The M1 IS expensive at 120+ bones, but I think it's the most effective IR light out there.
Also, in regards to you would like to have the same ranges as a PEQ. A few thoughts on this...I do not think you want ANYTHING near the power of PEQ (50mw) to take down a building. With this type of power at CQB, your NVD's would be overwhelmed by all the light. I think you're on the right track with an IR filter or a dedicated illuminator. Best to have you're PAQ's for some perimeter setups.
Hope this helps a bit.