I have a dead 120GB LaCie d2-case external firewire drive I'd like to rebuild. In searching what's available, options come up right away that I wanted to double-check... 1: ATA-IDE. All listings seem to be ATA, old drive says IDE... these are the same, right? 2: MAC-PC. Mac vs. PC... one source makes you choose early in the search process. But either is fine in OS X, once it's in this Firewire enclosure and hooked up, no?. 3: SERIAL-PARALLEL No specifics on the drive, box or website. LaCie's site says serial ATA is the latest in parallel ATA. Outpost.com makes you choose between the two, others don't mention it. Does it matter? Sounds critical. 4: BUFFER AND CAPACITY SIZE LIMIT? Bshiro says "just look around for whatever hard drive you want." but also says "Beware of LaCie's models <250GB because they only have 2MB buffers for the hard drives. You'd have to get the 250GB model to get a drive with a modern 8MB buffer." .... My old one is 160GB with 2MB buffer, but that's all a matter of the drive I'm replacing, no? If I get a new bigger one with 8MB buffer, will the chipset or case limit it or be incompatible? Or is this jus all the more reason to go bigger? 5: CAPACITY SIZE LIMIT? The biggest LaCie offers in this case (basic old d2, not Big or Bigger or Extreme) is 250GB, but I can easily get a 300GB replacement... any reason not to? too hot, chipset, buffer, etc.? 6: BRAND AND PHYSICAL SIZE? The old one is Western Digital... I know LaCie currently uses Maxtor and one other, not sure which. The Western Digital ones now look too big (in online photos), with an arc on one end for the drive itself, that looks like it could keep it from fitting in the case... know anything about this? Recommend a brand? They give no dimensions. 7: IS THE DRIVE WHAT'S BAD? One post somewhere else referred to a drive in which it was the power supply and fan that went bad... any way for a person without an instrument to tell? All I want to do is go to CompUSA or Fry's and buy one asap. I could get one online, probably even for a little less, but all those same questions (and more) come up right away in the search, plus I'd like to get the job done without the wait. THANKS FOR ANY ADVICE!!!!