i think i know what your getting at with just a pre put together old PC. maybe something from the IBM line?

i'm picking up one of these tommarow
http://john.ccac.rwth-aachen.de:8000/alf/ps2_70121/

hope it meets some of my old gameing needs. only problem though is it doesn't use ISA, think they used there own thing for this model.

I'm not a fan of useing laptops for gameing. just feels wierd to me.