1) Winchester use smaller technology, (90nm opposed to 130 of the newcastles) which will mean that the processor will run cooler, you can't get a 3200 newcastle.
2) It is alright for overclocking, when I had stock my cpu ran at 40*C idle and 52*C load. If you really want to overcklock far get a aftermarket one, thermaltake xp120 is the best, closly followed by the Zalman 7700 cu one.
3) A 3200 could get to 2.6ghz quite easily with the right motherboard, heatsink, ram.
Cisco CCNA, Comptia A+, 1/3 through CCNP