I don't think prison should be comfy. I am not for rape and what not, but definitely think that there should be no library other than law materials, tv, classes, color finishes, hot water, etc in max prisons for violent offenders. Keep them safe, warm, fed, and that is it.
If you want to have a discussion on sentencing restructuring or something like that, I would be all for it. However, if you kill someone(not standing your ground, of course), then you should be treated like an animal. Not as punishment, but as a deterrent for others.
Take all the money you want to spend on that crap and put it into prevention, mental health programs, education, etc. Basically anything that statistically shows that ppl with such things have a lower incarceration rate.