I love Philosophy and classic literature and I've yet to meet anyone that's managed to speed read Proust's "In Search of Lost Time", and then tell give me a detailed description of the plot, themes, artistic merit, and so on. Similarly with books like Ulysses. There's no possible way to speed read that book because it's so rich with allusions, references to religion, art, mythology, and philosophy. If you tried to "speed read" it, you would be missing half the point of reading it in the first place.
Reading great books isn't about numbers, you don't get rewarded for how many classics you read in a year. Reading great books is about slowly absorbing all the riches inside, something that just cannot happen if you're rushing. I've read The Brothers Karamazov and The Magic Mountain 4 or 5 times and each time I learn something new and gain a deeper understanding of psychology and life. I find it more rewarding to read and re-read the classics slowly, writing notes, using a critical guide (or book of companion essays), than smashing through as many crappy novels or modern popular non-fiction books (The Power of Now of any of Malcom Gladwells books are typical fodder for todays readers).