apple itunes download for windows hp pavilion 500 pc series

The current 500GB hard drive has about 400GB on it will doing a system image of this size just make the new hard drive as slow as the old one? I've backed up all the data on external drives, so I'm not worried about losing it, I just don't want to bog down my new computer with all the old stuff that I might only use say once a year. I want to keep it usable exactly the way it is since i'ts got all my schoolwork from the past 4 years on it with all the programs I've used in various engineering classes. I was hoping to do a full system image onto the new drive without cleaning out any files or reinstalling the OS if I'm going to have to do that to get my speed back it's not really worth saving the laptop. (http /The current ram is 4gb DDR3, and hard drive is 500GB SATA II.

On NewEgg I'm looking at 8gb DDR3 RAM (PC 12800) for $100 (http /and a HGST Traveler 1TB 7200 rpm 32mb cache hard drive for $80 I already bought a new laptop to replace it, but I thought it might be worth $200 to buy a new hard drive and an 8gb ram upgrade to bring it back to life. I have had an HP pavilion dm4 1173cl for about 4 years now, it's been a great bulletproof laptop, but now it is really slowing down to the point where it is unusable.

Apple itunes download for windows hp pavilion 500 pc series