Going with a mac? Definitely! You will love it!
What type? Depends on what you are going to do with it
I have a mini, its hmmm 3 years old now, its hands-down the best machine I have. I upgraded the ram last christmas and now it flys - even with my "pc" games which macs aren't supposed to do!
Point is - pretty much all modern macs are awesome, just tailor your purchase to your needs on it and enjoy the ride
twinkley