Sorry to be joining the discussion late, I was out of town. Thanks Fran for mentioning my E09. As for comparison, see below. The EXR5s is more keyboard, but twice the price than the E09. Arrangements can be drums & bass, trio or combo. You can also have A/B which again strips down or adds to the arrangement. For $400 it is a nice keyboard. Mine is brand new, demoed for about an hour in my home then boxed back up and ready to ship. My ebay listing ends Sunday, so check it out if you are interested. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&ih=010&sspagename=STRK%3AMESE%3AIT&viewitem=&item=200123670149&rd=1&rd=1

EXR-5s: Interactive Arranger
Features
The EXR-5s boasts a powerful 64-voice sound engine filled with great sounds. Its 510 onboard Tones, based on high-quality waveforms, as well as its powerful built-in speaker system, create power and realism never before heard in this price range.
• 61-note touch-sensitive keyboard
• 4MB of built–in Flash memory
• USB port for MIDI communication and data exchange
• 164 Styles covering many musical genres
• 100 User Programs and 126 Music Assistant for instant settings
• Pitch bend/modulation lever
• 16-track sequencer
• GM/GM2/GS/XG song data playback
• AC adaptor included
More Info
Outstanding Sound Quality
The EXR-5s provides 510 high quality instrument sounds and 20 drum kits, which come from Roland professional sound library.

Roland’s Best Piano Sound
Great piano sound is a key feature of the EXR-5s, as it comes with an amazingly realistic stereo piano sound that responds to the most subtle nuance and delicate touch.

Wide Variety of Styles
The EXR-7s features 164 fresh music styles created by top international musicians for a truly live feel. An innovative Cover function allows the player to choose from five presets for instant, real-time Style re-orchestration. Imagine creating new arrangements with one touch of a button!

USB Ready
With the built-in USB port, you can quickly exchange Song and Style data between the EXR’s internal Flash Memory and your PC. It’s easy. Just connect, drag, and drop! The USB-MIDI functionality also gives you the possibility to interface with various computer software programs.

Flash Memory
The EXR-5s is well stocked with Flash memory, which can hold up to 4MB worth of your own songs and styles (2.5MB is filled preloaded with bonus styles and songs). Add new Songs and Styles to keep your EXR-s up to date with your musical tastes.

E-09: Interactive Arranger
Price-Defying Performance
Features
Its price might say “low end,” but the E-09’s sounds and styles are nothing but first class. Building on the success of Roland’s popular E-series arranger keyboards, the E-09 ushers in a brand-new look, feel, and sound for the family. With its new high-quality sound engine, pro-style appearance, and powerful specifications — including a newly designed library of sounds and interactive styles — the E-09 raises the quality standard for entry-level arrangers.
• New high-quality sound engine; GM2 compliant
• Newly designed Musical Styles, including Western, Middle East, and Asian
• 64-voice polyphony
• 800-plus tones, 70 drum kits
• 47 Multi-FX plus reverb and chorus
• 16-Track recorder with Easy Mode
• Friendly Music Assistants, One-Touch settings
• High-performance speaker system onboard