Belter
1:- Instead of iFolder use www.freenas.org all file shares supported apple windows & linux, can use software raid hardware raid, runs rsync for backups, runs from compact flash 128MB with adapter on any old dog of af a machine, can be a slim serverfor your music collection , plus loads more stuff.
2:- Leave yourself with smoothwall 2.0 it may be old but its very stable try 3 & you’ll get headaches.
3:- As cleggton says use a Hauppage media MVP and run mvpmc for your mythtv frontend it also has a client for slimserver so you can listen to music from your freenas box as for looks use the themes… latest nightly builds are quite stable:-) I have 3 of these & they rarely miss a beat.