Iphone G4 Price

Should I go Macbook, or a PC Laptop such as dell, Sony, HP?
Its time for me to upgrade to a new Laptop, I have had my current Powerbook G4 for 6 years, and its been great(lasted this long), before that I had a PC(dont remember the brand) but it only lasted for a little over 2 years, before completely crashing. My current apple works fine, but its running a little slow and has some minor annoying issues that come up from normal wear and tear. I’m more inclined to get another apple, becuase I absolutely love my iphone, and feel comfortable with their OS and reliability, and my current laptop has lasted this long, and will easily last another year I believe, but then I was pricing PCs, and even though I am not very familiar with vista, the prices are much much cheaper, and you seem to get more memory, and they seem a bit faster, but I dont really know. The salesperson at best buy recommended I stick with Mac. What do you recommend? Thanks.
All Macbooks have “iLife” installed on them. iLife is a program where you can use the “iPhoto” program to organize photos two new ways: Faces, based on who’s in your photos, and Places, based on where your photos were taken. Then share on Facebook or Flickr with a click. You can use the “iMovie” program to make a great movie in the time you have. Choose a dynamic theme to enhance your movie in seconds. Or refine every shot with the Precision Editor. You can use the “GarageBand” program to learn to play piano and guitar. Learn songs from the artists who made them famous. Rock like a legend with new guitar amps and stompbox effects. There is also “iWeb” where you can Design a website to share your photos, movies, and music just by dragging and dropping. Add new dynamic widgets and publish and share with a click. Macbooks are the best computers out there. I have a dell computer but I really want a Macbook.
Unboxing of Powermac G4 Cube….Again