Your new motherboard choice is better than the previous one, but as you're going in for a full ATX case, consider a full ATX motherboard as well. The ones you've chosen are mATX/uATX - these will be smaller in size & have fewer expansion slots. The HD 4890 graphics card cooler is quite large & will occupy 1-2 adjacent slots, possibly leaving you with a single free expansion slot.
Also consider 2x 500Gb hard drives, as the price difference is likely to be only ~£10-15. G