when replacing my old computer with this new one I now have a tower ready for upgrade/working on should I just take that tower and update it and then dedicate that to mining ? buy better cards and such ?
If that tower has enough space so that you can put in a big card like 7950 then its OK and you can dedicate it as mining rig. And if you want to put more then one card in it then make sure the motherboard has two to three PCI express X16 slots. And a good 1200watts power supply as well