I have owned the NHT Sub-2 and my friend has a REL StentorII. The StentorII is a superb sub that will mate very well with your 2.5's and is better than the NHT. It should be as it retails for $4000 and the NHT only sells for $1200.00. The NHT is a very musical sub for the money but with Proac 2.5's I would stay with the REL. The REL also does amazing things for a speakers midrange. You gotta hear it to believe it. Highly recommended!!!
Natural sound (REL Subwoofers)
I am looking for a natural sounding subwoofer, and I hear that REL makes some of the best in the business. I am interested in the REl Stadium and Stentor. Has anyone had the opportunity to try these subs or make comparisons to similarly high-priced subs? I have heard less expensive subs like Sunfire and Velodyne and they seem too boomy, and therefore not worth the money...I am looking for something that will add ambient "space" to my music. I have heard the Snell 18" subs that go with the reference "A" speakers ...very nice sound but too big. Others that I am considering are Audio Physic, and Talon. Please tell me about your experiences, preferences, and biases. I have an aleph 3, proac 2.5s and plan on running them straight from a resolution audio cd55. Thanks