Tarkovsky is slow-moving, but I don't mind that sort of immersive film where there's a creeping psychodrama. I especially want to see his film "Stalker", which he considered his personal best.

Oh, and Lem's great, I proudly have several of his books in hardback. 'The Futurological Congress' is more Phillip K. Dick than he dared to be and then some. In fact, I think I might even get my copy and start reading it again.