interesting thread, the Emachine 6xxx series and the equivalent Gateway models can take an 80 gig HD without any special partitioning....I popped for a 80gig 7200RPM Hitachi unit a couple of years back....I think you can go as big as 120gig (138gig partition table max, but 120gig is the size closest) before you have to partition to use the whole drive....I reused the original 40 gig 5400rpm unit as an external usb mass storage device.....the 7200RPM HD's do add some speed....
you can still find the ide 2.5" lappy drives at Newegg, and sometimes on Ebay, but they are getting scarce....and you pay a premium for them....everything is SATA and DDR2 now.....
Since my m6810 hasn't traveled much, it is as new looking as the first day I bought it, no hinge cracks (I have tightened the screws), I have had it apart numerous times to change CPU (4000+), upgrade ramski (2gig), add new hard drive, replace battery (need another one again), work on the screen flicker, and change out to thermal paste from the orginal thermal pad material on CPU heatsink, done this several times.....I have been ultra careful with the AC plugin to the unit, no problems YET.....
Still a viable machine.....had a recent problem with sudden shutdowns out of nowhere, so I backtracked and removed Avira (a very recent install, obviously no problem before install) and updated the vid with the latest Omega Mobility drivers, sudden rebootage went away....so it was either Avira or a vid driver problem (doubtful on the vid drivers, but who knows), not all problems with the Emachines/Gateway's are hardware related......
Anyway, just my rant, it has been good to me all this time....
laterzzzzz