Well, I haven't seen either of those episodes (yet) but my favourite so far is The Brain of Morbius. What an episode, and it has great commentary from Tom and Elisabeth Sladen. Part of that episodes appeal is Sarah Jane. BEST. COMPANION. EVER. Coming at a close second would have to be The Masque of Mandragora.
Your Friend Down Under,
An apple a day keeps the Doctor away,
But if the Doctor is cute, then bugger the fruit!