Hi Jim
I feel for a music system you really don't need anything more than a properly set-up pair of VSM's. The off axis dispersion of the Esotar and Scanspeak woofer are more than enough and I would think by adding additional speakers you would probably be overdoing it, timbre matching issues aside. I am assuming this is for a music only system since you don't mention home theater. I would concentrate my attention on fine tuning the components in front of the VSM.
I also owned the NHT 2.5i's for a while. The reason why they might be enhanced by adding additional speakers would be that the sound stays within the placement boundry of the speakers due to their focused geometry angled design, definitely designed for sweet spot listening. The VSM's by contrast can be enjoyed well outside the sweet spot. On the other hand we each have our own priorities in what sounds good. I am a firm believer in less is more in the reproduction of music. The only more should be in the quality of components and attention to details in the set-up to realize the true potential of the Merlins. These speakers have no boundaries when all is right and you'll sure know it when it happens.
I feel for a music system you really don't need anything more than a properly set-up pair of VSM's. The off axis dispersion of the Esotar and Scanspeak woofer are more than enough and I would think by adding additional speakers you would probably be overdoing it, timbre matching issues aside. I am assuming this is for a music only system since you don't mention home theater. I would concentrate my attention on fine tuning the components in front of the VSM.
I also owned the NHT 2.5i's for a while. The reason why they might be enhanced by adding additional speakers would be that the sound stays within the placement boundry of the speakers due to their focused geometry angled design, definitely designed for sweet spot listening. The VSM's by contrast can be enjoyed well outside the sweet spot. On the other hand we each have our own priorities in what sounds good. I am a firm believer in less is more in the reproduction of music. The only more should be in the quality of components and attention to details in the set-up to realize the true potential of the Merlins. These speakers have no boundaries when all is right and you'll sure know it when it happens.