Arizona took over the top spot in the AP Top 25 men’s college basketball poll on Monday, a reward for a perfect start to the season that includes a quartet of wins against ranked foes, including a lopsided victory over Auburn last weekend. Purdue, which had spent the past three weeks at No. 1, slid to sixth following its 81-58 home loss to Iowa State and the entire poll got a shakeup as only two teams remained in the same spots from last week….