to buy or not to buy??

I am seriously considering buying FSX.
Ive heard mostly good things about this sim but I would like to have my questions answered by people who own this sim and know what they are talking about, rather than magazines that kiss up to Microsoft like there's no tommorow.
1. Will my computer run FSX ok, I mostly fly small aircraft and warbirds at low altitude.
My specs are as follows
Pentium 4
Ive heard mostly good things about this sim but I would like to have my questions answered by people who own this sim and know what they are talking about, rather than magazines that kiss up to Microsoft like there's no tommorow.
1. Will my computer run FSX ok, I mostly fly small aircraft and warbirds at low altitude.
My specs are as follows
Pentium 4