Is this going to be slower or faster than the new Dell 13z?
Slower, but £200 cheaper.
In day to day use, web browsing, video playback etc. you're unlikely to notice it much. However the CPUs (particularly the dual core ones) are quite a bit quicker.
Those that have upgraded the ram. Did you find a big difference in the PC's speed / usage? Just wondering wether or not to buy the ram now or wait a little bit.
For the £30 it costs it's a worthwhile upgrade, quicker to boot, start programs etc.
I was talking about Windows 7 as I'm running Pro on it, I imagine most people would upgrade to W7.
More RAM makes a difference because Windows 7 makes better use of it than XP, storing often used files in the RAM making programs quicker to launch and more responsive for example.