The G2  is a Flash-based shuffle mp3 player.

Pros:

• 1 GB of storage
• Supports OGG, MP3, WMA, WAV
• User-friendly
• 5 equalizer presets (Normal, rock, pop, jazz, classic)

Cons:

• Uses USB 1.1 instead of USB 2, making file transfer much slower
• Large frame for a flash-based player (64x46x18mm)
• No FM tuner

 iAudio 7  is a small MP3/MP4 player

• 60-hour battery life; rechargeable lithium-polymer battery
• Available in 4GB [black & silver] and 8GB [black and red]
• Great measurements (1.3 x 2.9 x 0.7in, 51g)
• Supports MP3, WMA, WAV, OGG and FLAC
• FM radio

Cons:

• Small screen (1.3in), though it is colour TFT LCD with 260k colour-support
• No gapless playback

As a video player, it supports XviD and MPEG4.

iAudio U3 

Pros:

• 3GB flash memory
• Lightweight, sleek design
• Good audio performance

Cons:

• 30 mm colour video screen too small for video and pictures
• Requires two different desktop utilities
• Pricey: for an extra £20, you could get a 30GB iPod 

iAudio X5  

Pros:

• 30 GB storage
• Compatible with mp3, WMA, OGG and FLAC
• Reads photos directly from camera
• FM radio
• Compact (61x18x104 mm)

Cons:

• Poor browsing capabilities
• Must convert videos to a special format before playing
• No music while viewing pictures
• Must plug in an adaptor to attach AC, line-in and USB cables

iAudio F1 

Pros:

• Race-car design makes it ideal for pre-teens
• 1 GB storage
• OGG support
• Above average FM tuner/recorder

Cons:

• Poor battery life
• Lacks DRM support