I don't think an SSD will do you much good for music storage compared to HDD. First off, you won't be able to save that much because SSD is like a dollar a gig and HDD is about 10 cents a gig. Unless you're willing to spend that much money of course. Yes, HDD is much slower than SSD much you don't need high read/write speeds for playing music.
I came across a 500GB HDD that is almost fully filled with videos. It took a few minutes for my PC to read the entire HDD D: