Spartacan,
Having the same debate with myself. (Can't debate with SWMBO as she doesn't do tech)
I would be reluctant to change my pc - it has an i5 2050 8gb. Seperate ATI radeon graphics card. This set up was the dog's boll**** for reasonable pricing in its time. I think it might be a job for our local "cash will do nicely, sir", PC fixer. But if I give him the necessary, how long can I postpone the £500 outlay on a new tower????.
And other non-techie folk do snigger at my antique set up................