My MacBook Pro is going to die soon. I'm starting to look for a replacement. The obvious solution would be to buy a MacBook Air, which seems to be quite good and very light. The other option would be to buy a cheaper PC laptop (are they called ultrabooks?) and run Ubuntu on it.
For seven years, Linux was my main OS (SuSE and Kubuntu). Now, although Mac OS X is the OS I use most, I continue using Ubuntu in a netbook. There are two killer applications in my mac and I'm looking for good alternatives.
The first one is Spotlight. It lets me find e-mails, files, open applications in a very fast and convenient way. I use it frequently, several times per day.
The second one is Time Machine, a back-up solution. It has save me few times during the last years. It isn't something you use frequently, but the day you need to use it, you really need it.
For the rest of software I use, there shouldn't be many problems.
English is not my mother tongue. So, be ready to read bad grammar and limited vocabulary