I am downsizing my system to one of the new shuttle xpcs (sb51g) after reading all the good reviews... i want to get a 1.8a or 2.0a and run it at a 533 mhz bus... but i'm afraid the 2.67ghz that the 2.0a goes too will be too much for such a small case... although with all i've heard, the same cooling would be ok for the 1.8a, which would run at 2.4ghz... anyone got any thoughts or advice