Primarily giving you some options to give you a feel for the variety available. A deep dive into this segment will expand the list. [Note: I am not making any recommendations]
Some are much lower than your stated budget. Others are right at it. A couple may be above.
Google them to learn more and see which ones fit your needs best.
- Revo SuperSystem
- Denon D-M41SBK (with speakers) $499
- Bose Wave SoundTouch Music System IV
- Sony CMTSBT100 Micro Music System (with speakers)
- Onkyo CS-265 or CS-375 Home Audio System (with speakers)
- Phillips BTM2180/37 (with speakers)
- Yamaha MCR-B043 (with speakers)
- Yamaha TSX-B235
- Pioneer Electronics X-HM76 (with speakers) $499
- Sharp XL-HF203B (with speakers)
- Audioengine HD3 (wireless+powered speakers)
- Tivoli Music System BT
There are higher priced options that can be found used/demo/etc. at lower prices. Here are two examples:
- Panasonic Technics OTTAVA
- Naim Mu-so Qb 2nd gen
If you go the Bluetooth speaker route, there are tons of inexpensive options. Some quite good in terms of sound quality.
Another option is to go the Soundbar route, which may have value if you also want to integrate audio from video sources.