I have owned and enjoyed a NV610 for about 7 years now, and I have been intrigued by the Ampeg Heritage 810. I love my NV610 and I have owned several Ampeg 810's over the years... 70's, 80's and 90's versions. I was wondering if anyone has any direct comparisons with the Heritage 810 vs the NV610? Please no comparisons like, 6-8 speaker or the 810 will be closer to my head level. I am looking for direct comparisons on sound only. I am not sure I why I am interested, other than the grass is always greener and I have had the same rig for quite some time. My '76 SVT isn't going anywhere. Any insightful comments would be appreciated.