White Noise is one of my favourite books. The only other Dellilo I've read are Underworld and Endzone.
I've never read any Maugham but I have Razor's edge in my bookshelf right now, it's been in line for a year now though.
I've never read any PK Dick. When I was a kid I went through a sci-fi phase but I stopped reading it and never really got back into it.
I'm glad you said that about the Pynchon, I read Gravity's Rainbow about 20 years ago. I was young and just moved to the city so I had a weird job where I was working two different shifts at a bullshit company that was an 1 1/2 subway ride from my appartment. I ended up being on the subway for 6 hours a day, and I read it then. I enjoyed the writing but got lost to the plot. At first I kept going back and rereading trying to keep straight all the different military divisions and characters]. Eventually I thought it probably didn't matter and it would make sense without getting a handle on every different plot line, and I plowed through. I finished the book and realized I had no idea what had just happened or what any of it meant. I felt like either it was purposefully, absurdly complex as an exercise, or that I was too dumb for Pyncho. I was glad I read it, and liked his writing as paragraphs but figured Pynchon wasn't for me. Now I see so many people name checking it as a favourite book, I went back and started to re-read it in the summer, and it was the same, I liked the writing, but I couldn't keep the plot or characters straight.