Re: Ubuntu Linux or Windows 8?
Choices make the world go 'round. I don't think there's a perfect OS - all have strong and weak points.
I have found that for some older hardware that Linux Mint 15 makes it truly functional - this same hardware is pretty sluggish with Ubuntu Unity, and pretty much function-less with Win XP (which I've totally trashed). I haven't collected 'real' data to post. Since you own Win 8 there's no real hurry to rid yourself of it. On my much more modern desktop pc I have Win 7, Ubuntu 13.04, Linux Mint 15 and a test installation of Ubuntu 13.10.
HP | Intel iCore 7 3.2Ghz | 12 Gb mem | SSD Win7 | HDD Trusty
Dell laptop | Intel iCore 3 2.1Ghz | 4 Gb mem | Win 7 + Trusty