Core 2 duo question

I've got an older Dell Inspiron with a pentium 4, so I think it's time I upgrade a little bit. I think I'm pretty much leaning towards the dv2000t and am torn between a core duo or core 2 duo. Just a couple questions:

1. I've read a little bit about the core 2 duo's making some kind of ringing sound when idle. Has anyone else experienced this? Did this just happen to a few people for various reasons, or is this something I will be likely to face with the core 2?

2. Would it really be worth it to go with the core 2 duo for more future proof purposes? I expect to have this laptop for at least 3 or 4 years, so will 64 bit processing really be in full force during that period? Also, do all the core 2 duo's support 64 bit, or just some of them?

I also have a question about the screen. I've read a little bit about how a lot of the people here don't like the SEC screens, so I kind of want to avoid them. If I buy an HP from their website, what kind of screen will I likely get? Does HP have a tendency to use a certain make of screen, when building customized pc's ordered off their site? Thanks for any help!

 

I have had a DV6000t for almost two days, so my exprience with it is not much. But Heard a hight pitched noise. There is a solution for that called RMClock (1.2), install it and search for exact setting to prevent that. It's often when the computer is idel.
When I ordered my Pavilion, I asked the rep to make sure I get a QDS and not SEC. She said no promise but she noted my account. After almost 2 weeks of waiting, I got a LPL (LG Philips) which is nice and bright as QDS and Sony Viao's screen. I would say is more of a luck than other things.
About 64bit, I would say that I personally, did not want core due because core 2 due was out. For the price I paid $1314.00 I got a nice T7200 Core 2 Due (Meron) on DV6000.

 

64-bit won't be necessary, don't worry about it

Get Core 2 Duo only if the speed increase is important

 

The Core 2 Duo will have the best performance gains in CPU intensive tasks. Any CPU you buy today is gonna be old in 3-4 years. They are already working on quad-core cpus and so on.

 

Speaking of CPU-intensive tasks, I tried out SuperPi on my dv2000t Core 2 Duo T7200 (2 GHz) and came out with 1 minute, 4 seconds. That was with a number of other tasks running.

One of the best things about SuperPi is the historical info that came along with it, which said it took three days on a Pentium 90MHz to calculate pi to 33.55 million digits. I think most computers would do it in 15-20 minutes now. Ain't technology grand?

 

I apologize, I kind of overlooked the actual topic for the moment...

I have a Core 2 and have heard no whining or any other odd sounds from the computer. Compared to the old Pentium M Gateway I had at my last job, it is silent.

 

I would be very surprised to discover that any CPU makes noise. It's just a hunk of silicon. The heatsink and fan on top of it, yes, but that varies depending on the notebook OEM/ODM and model, not just the processor type.