the only issue on the 150's is size. they are big and boxey and weigh almost thirteen pounds, so don't plan on using the $ 11 speaker braces from Walmart to keep them up on the sheetrock. these are actually intended to be a small bookshelf speaker, not a bose-alike microbox.
that being said, I use (and am extremely pleased with) a set of Primus 150's for surrounds in the bedroom set-up (sitting on a couple of art-deco shelves that I picked up unfinished for about five bucks each at Walmart. they do a great backfill for the Alpha 20 bookshelves I have for fronts and the Alpha center.
they sound great, just be prepared to deal with the beef.