Holy crap. This is in no way enough for running xp based system. I have P4 1.7 ghz with 256 mb ram. Still its performance is way below whats we called optimum xp performance. I feel min req for xp would be P4 with 256 mb ram.
Anyway i doubt if u canget anything as good as ZA which i m personally using for more than 3 yrs. This was one of the reason why i migrated to xp frm 98se, other reason being discont support from microsoft.