Another PC to Mac convert... I switched in 2004, and have never regretted it.
When I take it away with me, there is no messing about to log onto the hotel wireless networks and the likes, just doe it all automatically. Wen I go back to the same hotels, I do not need to enter the passwords any more for he wireless, it has them stored and connects straight away.
Very fast, quick, easy to use. I have the entry level MacBook, and for £699 or whatever it was I paid when I upgraded last year, was well worth it. The standard spec is great.
As for it getting hot... it gets a little warm sometimes, but nothing to write home about...
I say go for it and you will discover a whole new world!