I did some roasted potatoes the other day at 425ºF near the top of the oven and they were nice and crispy with some browning.
I use a quarter sheet pan lined with foil. Spray the foil with Pam even though you toss the potatoes with oil and they will stick a lot less.
"If you want to make an apple pie from scratch, you must first create the universe." -Carl Sagan