Thunderbolt...haven't heard/read of errors yet but I'm wondering how come they haven't made thunderbolt drive enclosures that you can add your own 2.5" or 3.5" SATA II/III drive to and have them run at the drive's full interface speed. Seems like that'd be quite popular to me. ...perhaps they're coming.
The big draw to Apple for me is their build quality/design. Of course you can get as much if not more power for less money. You can also get a Ford Mustang to go as fast as an BMW M3...and some would prefer the Mustang. Yes, Lian Li makes nice aluminum copy-cat chassis' (that are really nice quality) that an enthusiast in the know can use to build a nice rig...and if that enthusiast cares they can do a nice wiring job...and...