What's the fastest memory-heavy laptop you can buy for your home?

My laptop's slowness is driving me insane. I do design and videomaking, and I need a lot of memory/RAM. What's the fastest laptop a person can buy for their home? And this doesn't have to be an Apple vs. Dell war. If the computers are faster in Japan, I'll fly to Japan and get one. (That's where I bought a camera.) If Germany has us beat, then that's what I'll look into. But I need to know what laptop computer is the fastest before I start pulling my hair out. I've been hunting online, but I need advice. So please help me by comparing/citing actual numbers that will let me know who's the fastest.

Thanks!

Before you make a big jump, you might want to try to find out what's the holdup on your current machine. Video and graphics write directly to the graphics card on board memory and the problem may be due to limited memory on the card. Other time issues are the disk access time and clock speed.

I would suggest you go to a local value added computer shop and explain what you want to a technician. Take your current laptop so they can run some benchmark tests to find out where the bottleneck exists. That way you can avoid the possibility of buying something to solve the wrong problem. They can build a system designed to do exactly what you need.