Main Media Server with 11tb of media files on a Raid6 array.
Mythbackend server with 2tb with 2 x dual DVB-T tuners and 3 x
DVB-S(2) tuners, all running 2 channel multirec
4 x dedicated htpc systems hooked up to AC3 amps and large flat screen TV's
4 x laptops used for assorted tasks inc mythtv
I've recently been playing with the mythfrontend android app and it
works quite well now just needs a bit more functionality.
probably 50% of recordings made get compressed using nuvexport and
then dumped into the Media Server library.
I would strongly suggest you build a box with at least RAID5 and
preferably RAID6, once you start to build a library you'll hate it if
you lose it.
My mythbackend is a quad core system which is overkill but useful as I
use it to also run a couple of VM's occasionaly.
If you want to get serious about this you should work out your budget
in advance so you have a clear idea what you are trying to achieve and
what you're willing to spend.
Regards