Welcome Clare! Already you have the little Ti Mercury tugging at your hearstrings! I have the same - the 500Mhz 15" Ti Powerbook. I have actually upgraded as much as possible (as far as I know). I have upped the RAM to 1GB, added a 250 GB HD (although I still have the problem where it only recognizes 128 GB), and I have replaced the old CD/DVD ROM with a Superdrive. I am about to switch out the top case, which is badly cracked, and then she will be better than ever! I like the Merc because it fits me. I have large hands (like having a ham at the end of your arm), and the large wrist pad fits me perfectly. I am also a sentimental fool, and she is my first Mac. I have thought about the MacPro, because I do like it, although I have never gotten to use one for a while, so I'm not sure about the eyestrain. I run OS X 4.11, and the fonts are fine, I didn't know you could, or should smooth them. My only complaint is the video card and the processor speed together have trouble keeping up with some videos. Other than that, I really love my Merc. Other longtime Mac users are always surprised to see me working on it. Again, welcome! Kent "A person who won't read has no advantage over one that can't read." - Mark Twain "Outside of a dog, a book is man's best friend. Inside of a dog, it's too dark to read". -Groucho Marx