Some people feel that surrounds can be just anything. I feel you want to match within the same brand if possible or at least the same family (in your case Revel is the brand and Harman is the family). Harman has a patented technology for surrounds called Hemispheric Sound field Technology or simply HST. It is designed specifically for wall mount speakers and works great. I use the Infinity RS152 as my rear surrounds and it makes it sound like the entire back wall is a speaker. JBL also uses it in their Control HST. You can get the Infilty RS152 on EBAY and the JBL Control HST from Sweetwater or Crutchfield . I think either would be a good match for your Revels (all from the Harman family) and are within your budget. See:
