The multi-disc players below play standard CDs, RW-CDs and MP3-encoded CDs. 

Denon DCM-380 ($299.00)

The Denon DCM-380 5 Disc Carousel CD Changer features playback of CD/CD-R/CD-RW and MP3-encoded CDs. It also features  HDCD® Decoding , Burr-Brown 20-Bit D/A Converters (PCM-1748), Synchro Record function,3 mode random playback. It has coaxial digital output which some audiophiles feel provides superior sound to optical digital output.  In addition, it has Intelligent Disc Scan , 20 Track Music Calendar Display, 32 Track program memory, front panel headphone jack , remote controlled volume up/down, and Remote I/O Ports.  Denon also manufactures the DCM-280 without HDCD capability for $100.00 less and still plays MP3 discs.

Onkyo DX-C390 ($199.00)

The Onkyo DX-C390 is a six-disc player and has gotten great reviews from owners. It plays CDs, CD-Rs, CD-RWs and MP3 CDs.  From the Onkyo website:

Those looking for the ultimate in CD playback from an audiophile-grade component will be impressed with a high-precision, multi-bit D/A converter and 128 x oversampling. Others looking for convenience will thrill at the sight of 6-disc capability, 6 repeat modes, 40 track programming—and no worries about interruptions to your music, with the ability to change 5 discs while the last one is still playing. All will marvel at the crystal-clear playback, enhanced by our exclusive VLSC (Vector Linear Shaping Circuitry), for a smoother sounding audio signal. Just as crucial to your sonic enjoyment is Direct Digital Path, a heavily shielded, high-quality cable that protects the delicate audio signal from noise emitted by the surrounding circuits. Housed in a sturdy chassis graced with a brushed aluminum front panel.

Sherwood Newcastle CDC-690T ($299.95)

From the respected audio manufacturer Sherwood comes the Newcastle CDC-690T. It is one of the few multi-disc players manufactured in the world with a handsome silver finish, a visual trend welcomed by those tired of basic black. It plays most digital formats including MP3. Like many multi-disc players, it features a headphone jack and volume control, so you technically could use this as your only audio component if you are cramped for space and love headphones. It is a 5 disc player and is affordable at under $300.00 U.S. 

Sony CDPCX455 400 Disc Player ($249.00)

The Sony CDPX455 player can handle 400 CDs and is the only megaplayer in the standard Sony line that can play MP3-encoded CDs.  From the Sony website describing this player:

Sony's CDP-CX455 400 Disc MegaStorage® CD Changer is perfect for your extensive CD collection. Access your CDs with ease using Twin Jog Dial and enjoy MP3 and CD-R/CD-RW Playback. Utilize features like Custom File Memo, MegaChanger Control, Optical Digital Output, CD Text, and 2 Repeat Modes (Disc or Track) to make the most of your music. Keyboard Input, FL Display, 32 Step Program Play, Control A1 II, and a Remote Commander® Remote Control are also included. So take control of your CD listening experience with the CDP-CX455!

One specification that should interest those who demand quality is the weight. This player weighs nearly 20 pounds, so it is no lightweight. With a list price under $300.00 U.S., it is also a good value.