The SONY D-NF611.
The player looks great, is very lightweight and the bass enhancement gives it a great sound. Also the built-in radio tuner is a great little feature.
The player came with a free pack of 5 coloured SONY blank audio CDs (for use with the ATRAC3-plus feature) and a nice SONY carry case. No complaints there. (BTW: you're too late for this offer but I thought I'd mention it anyway haha. Its still worth the money without it).
The highlight of the product is obviously its ATRAC3-plus feature. I haven't yet burnt anything, I'm in the process of "creating an image for the audio CD", which does take a while but hopefully my patience will be rewarded. The software installed quickly and easily and is very easy to use.
Rechargeable batteries would have been nice, but it does come with an AC adapter, and this is only one small downside to a product with so many good points.
Very happy with this package, it has pretty much everything you could ask for from a player and its under £100.