Is the Velo ported or sealed box? The Aerial will make some port noise when the frequencies get real low and the volume loud. I do not have experience with the newer Velos but I always admired them and still do. I had an SW12 for some time in a previous system and I really enjoyed it. IMHO, you can't go wrong so it will probably come down to styling, price, hook up options. I think the new velo DDs have an easier to set parametric eq and also don't they have some elementary form of RC? That might be the differentiating factor. Maybe you stick with the SW12 to keep it "in the family"? Just some rambling thoughts.

best regards,
Jerry

Best regards,
Jerry
Main System: 861v6, DSP8000s in corners, DSP7000s Center and Sides, 1-9 humans.