I've been using armory and my own brain key. (I'll let all of you decide if I'm a fool or not). But as the password has over 100 characters I'm fairly confident that,at over 10^130, that it's safe.
Your 'brain key' contains 'over 100 characters' and its at about 10^130, interesting.
It seems like you are using a set of 10 characters and a set of 130. Thats pretty unefficient..
Why not using a set of 62 character (a-z,A-Z,0-9) and only a length of 72 with the same entropy?
Oh.. and did you already know that bitcoin private keys are taken out of a 2^160 pool ? Thats about 10^48.
Compared to your 10^130 thats pretty weak
You can be proud to have a password which is massively stronger than the thing it protects.Since in this scenario it is easier to crack btc and as we all know bitcoin can't be broken, such a long password may be a bit (?) paranoid, but i'll let you decide.