Hi guys, my Dell Inspiron 15R is running really hot now 75 C idle and 100+ C on load and if I dont do something then it can very well fry in summer. I need to clean it and apply some good thermal paste. What should I buy ? Arctic Silver 5 [Rs. 580] or Arctic MX4 [Rs. 810] or Arctic MX2 [Rs. 625] or Noctua Nth1 [Rs. 510] ? What is the best thermal paste?