I'm going to make another suggestion for finding something on EBay. I suggest looking for some older Boston Acoustics speakers. I don't know what the other speakers suggested sound like, but the Bostons would fit exactly what you are looking for, especially if you go for one of their bigger bookshelves. Even their biggest bookshelf in their Compact Reference Series (the CR9) can be had for under $200. For your budget, I would recommend (from the best down) 1. CR8 / 85, 2. CR7 / CR75, or 3. CR6 / CR65 / CR67. I've bought 3 pairs of CR8s or CR85s (the numbers added to the end are for the updated newer models) for under $140 a pair. I can tell you all of these speakers give a crystal-clear reference-quality (accurate) sound with good low end. Additionally, they pair well with Yamaha receivers and with your sub (I have a similar Mirage). That's what I recommend.
7.1 Setup: Yamaha RX-V671, Boston Acoustics VR40 (Mains), VR12 (Center), CR8 (Surrounds), CR8 (Rear Surrounds), Mirage Omni S10
Second 7.1 Setup: Yamaha RX-V663/Kenwood KR-5030 (Stereo), Boston Acoustics VR20 (Mains), VR10 (Center), CR6 (Surrounds), CRC (Rear Surrounds), Klipsch Sub12HG
2.1 Setup: Nakamichi RE-2, Boston Acoustics VR40 and Mirage Omni S10 (shared with 7.1), Emotiva XDA-1, and Pioneer, Kenwood, dbx, Luxman, Burwen, and JVC vintage equipment