Version with x64 kernel should detect all 8GB RAM.
4.4-r5 - the most stable image I've ever tried. But it missing few things, really necessary eg. for me.
5.1 - I've noticed problems with screen (Intel HD graphics) and sensors.
6.0.1 - No problems, everything is usable, stable. Sometimes drops WiFi connection, but I saw that it's fixed already. We have to wait until next stable release.
Myself-compiled builds don't have problems with wifi.
4.4, 5.1 sometimes has problems with USB storage.
Overall I prefer 6.0.1 x64 image. If you have problem with sound, wifi or even graphics... I can build special image for your netbook.
You can also try
RemixOS - best alternative for any desktop OS. It's based on Android_x86, but till now has problems with stupid GRUB.