Get an iMac(with the best specs) or a Mac Pro. You can simply not go wrong with that. Even the cheapest iMac works fine, but if you really want some real power, go for an upgraded iMac or a Mac Pro. Now, no one can afford this unless they have been saving for a year, won the lottery, or robbed a bank, but do not despair.You'll come a long way with a MacBook Pro too. But you'll probably have to rob something to afford this as well.
Conclusion: Rob a bank, get a Mac. Thank you.