hi there i dunno what Pent pro.11X600 means

but looking at other stuff i cannot judge what u'd prefer.
500+ ram is always good.
but that 2gb hdd its bad (if its not a partition)
I'd imaging its like 4500rpm or something. i well know that when i moved from 5400rpm to 7200 rpm it felt like i upgraded my whole pc. so if its 4500 don't install os's like 2000/xp. or get a faster hdd or if your 40gb hdd is faster swap the drives.
about the crashing.
95/98/98se/me crashed frequently about the same.
2000/xp --> I've managed to crash them billions of times now, well less than 9x series. but there are some reasons behind that. if u do everthing in order it won't really crash. sometimes u use lots of rams for 1 app and do some other ram eating job. well sometimes it doesn't respond. and u click x,x minimize ctrl alt delete. NO, just wait for a while for the other process to finish!!!!. this way it won't crash
this waiting process is dependent on many things.
some apps use lots of cpu, and those probably use lots of ram as well.
some apps just use the hdd. (i mean like defragging programs) when it defrags (diskeeper) your computer will be slow as a turtle.
on the other hand if u're writing a cd the cpu and ram will be used very much. and so on.
so u got to wait for a while when launching apps, and I've to tell u if u have many programs running its better to wait for them to finish instead of trying to close them. closing them ends up in higher cpu and ram times. so wait!!!.
also in games, they don't crash. if they crash the game company releases a patch for it. its nothing wrong with xp. its just the game company couldn't make it compatible. they find the problems and fix them. unless u're using warez stuff its not likely that it will crash.
sometimes some apps crash bc windows tries to increase the virtual memory thus causing the memory to be wiped. this might cause in crashing the games and programs...
after all its not hard to crash an os. I've crashed mac's as well. the one's I used (g4) were very slow. it takes ages to even open up internet explorer/acrobat etc...
don't blame the os for everything. everyone is trying to make best out of it.
if u're going to upgrade to something upgrade to xp. as HyDeNCiTy mentioned if u have some money saved u're better of just upgrading.
nowadays most motherboards have most of the things on board. so get a good mb. if u play games get a geforce 4(I'm saying this bc they very cheap these days, and the qualities are ok) and get some 512+ ram.
well keep the mouse/keyboard/modem/monitor/etc stuff.
400-500 would be fine. companies like dell/etc. have great deals for prices like that....
nothing wrong with Home version and its cheaper... if u don't intensly use networking/etc (stuff that comes with pro) u should be okay with home.
athlon's would be a cheaper solution for u but u've the issue of temperature and don't say its just temp I don't care about it, its important. b4 i got a cool fan, temp was crazy and my os often crashed.(well there were some other reasons as well....main reason temperature..)
etc... look at pricegrabber/pricewatch/ etc.. if u want to make your own pc.... good luck..