This is a horribly basic question but IMHO the Ubuntu download page is confusing.

I have a 32bit 2.6GHz duo core 4Gb of ram Dell Laptop. 3 years ago it actually was a beast. Now I want to install ubuntu, which ISO should I use?

The download page gives a silly looking choice:
  • 64bit
  • 32 bit for machines with less than 2GB of RAM

So which one I should use? I have 32bit laptop, but I want to use the full 4GB or ram...

Thanks in advance,