You are not only limited to the old, slow and noisy Hitachi drives, check my thread here
for some alternatives. But it will require some extra work...
By "extra work", are you referring to using a ZIF-IDE adapter caddy? Other than connecting the drive to the adapter caddy and inserting the drive to the HDD connection port, is there any more involved with the installation? Also, except for the occasional domestic offering on eBay, can you recommend a local source for these other than caddies purchased and delivered from Chinese vendors on eBay)?
Preferrably, I'd like the tablet to also handle DVD playback (I understand that solid streaming video is probably beyond the X41T's graphics ability). Any suggestions?