I recently got a new set-up, but I'm not going to embarrass myself by telling you all about its specs, mainly because I haven't a clue (didn't have to make those decisions) but I did insist on some really important features (to me) which I'll mention.
Most importantly a Bluetooth keyboard and mouse. I will never go back to corded ones ever again, certainly not for a mouse. It's wonderful! Also have one of those flat plasma screen monitors which takes up so little room on my desk that I can put all sorts of clutter between the monitor and me now. Fantastic clarity, too. Finally I now have a drawing whatsit (tablet?) with electronic "pencil" for when I fiddle with photos and other things. It's really easy to use, well, once you get used to it, anyway. Great gadget.
Okay, back to the big boys......