Consider the
Acer 3820TG for 570 (I got it for that price new on eBay):
:: Processor
Intel Core i5 460M 2.53 GHz
:: Mainboard
Intel HM55
:: Memory
4096 MB, PC3-10600
:: Graphics adapter
ATI Mobility Radeon HD 5650 - 1024 MB dedicated
:: Display
13.3 inch 16:9, 1366x768 pixel
:: Harddisk
WDC WD7500BPVT-22HXZT1, 750GB 5400rpm 2.5-inch, 5400rpm
:: Size
height x width x depth (in mm): 28.9 x 324 x 235 (about the size of an m11x)
:: Weight
1.815 kg (around 4lbs)
Check the Review here:
http://www.notebookcheck.net/Review-Acer-Aspire-3820TG-Subnotebook-i5-HD5650.38666.0.html
Also there are a few dedicated threads like this one with loads of info (including mods like a backlit keyboard):
http://forum.notebookreview.com/acer/561840-3820tg-owners-lounge-part-two.html
You might want to know that it plays Kirby's Epic Yarn on Dolphin beautifully.
And if you're interested in installing OSX:
http://www.insanelymac.com/forum/index.php?showtopic=253559
I still can't believe what I got for the price... I was looking at used Macbooks above this price and then I looked over and saw this gem.
It doesn't have a dvd drive, it has 2 fans and is very slim, also it lasts over 6 hours. hdmi-port and everything...
I think this should be in the OP.