LAPIII - Your memory use will vary greatly based on the desktop you utilize. I'm not particularly familiar with Sparky, but I know openbox distros based on debian 7 can run under 150mb at idle. I would expect debian XFCE to run around 220-270mb. Somebody who knows Sparky better can give you a more exact number. I'd say if you have a gigabyte of memory you can do quite a bit with LXDE. My guess is your CPU will be your real bottle neck. How much memory do you have? What is your CPU?