Okay! If i would think about using this computer for daily basis use from time to time aswell, would that drag down the hashes if i perhaps buy a good CPU and more ram? Maybe i should just get one pc for mining sitting there next to my other one?
When you're mining at high intensity (which you want to be doing for optimum hashes) the computer really doesn't like you doing anything else. I think miners like cgminer were originally designed to have a scaled intensity between 0 and 20 so you could dial it back if you wanted to do other stuff at the same time. But the difference in power between intensities at the higher end means that if you want the best performance you can't really use the computer for anything else. So for a dedicated miner you essentially set it up and let it run. A better CPU and RAM wouldn't help you multitask between mining and normal use, alas.
I use my home computer as a miner - when I need to do something important, I turn off the mining software and use it normally. So I'd recommend, if you have the cash, to build a stand-alone computer to mine beside your other comp (which can also be a miner too if you set it up right). Otherwise you can do what I do and mix it up with a single PC.