Best Linux distro for this laptop?

I’m currently using Ubuntu, and it runs at a moderate pace, but I’m wondering if there’s something out there that will run faster but still have a nice GUI. I’m comfortable working in terminal, and definitely need the option to customize things, but I definitely don’t turn my nose up at ease of use and a nice, intuitive interface.

For instance, apt-get is one of the most beautiful things I’ve ever seen.

Here’s the laptop I’m using: http://www.amazon.com/Sony-PCG-K35-Laptop-Pentium-Processor/dp/B000625D8G

Any suggestions?