with that kind of money, you can buy phase change which gives you much better temps. or you can spend less for a really good watercoolign loop. either of them will perform better than that TEC setup. a good TEC setup needs at triple rad, that 120mm single radiator isn't going to take all the heatload from the 224watt TEC.
you can buy another triple radiator, but that'll be more expensive and won't be as good as phase change