Motherboard: If you don't want to overclock but you need a nice board, get the ASUS P5B or P5B-E motherboard...nice board, you won't have any headaches...
Ram: Get Geil's, Corsair's or G-Skill's value Ram...whatever you want...although... remember that if you don't plan to overclock, there is no need to buy expensive (value) DDR2 800 Ram, you can go for DDR2 533 (board's standard bus speed = 266Mhz x2 = 533) or DDR2 667.
Good Luck!!