Experience with Pentium Dual Core 3 Ghz CPU & Lenovo?

Do you have any experience with Pentium Dual Core 3 Ghz CPU? I am looking at an offering from Lenovo, currently in negotiation, for purchasing several PC’s. Specifically I am looking to know:
1. With their reputation for heat generation, how suitable are they for east-Indian climate of Kolkata?
2. How is Lenovo’s reputation in Kolkata in terms of product & customer service?

Note: I am aware that Lenovo purchased IBM. However I also heard that the quality of the products has deteriorated since. What is your experience with Lenvo desktops?