Getting the most expensive computr would be useless as there would be unnecessary untapped performance. Get a computer which fits your needs and not more for cheap or a higher computer for a better bang for the buck. Then when you need an upgrade, you will be able to get the latest and greatest which will make up for the performance you left behind. You might end up spending less also. You can upgrade more frequently and there wont be any untapped performance.
But in your case, you will get a better deal if you go for a basic Mac Pro even if it is a 2.0 Ghz model. You can upgrade the procs later. You can easily upgrade the HDD, RAM and graphic cards without voiding the warranty I think.
But in your case, you will get a better deal if you go for a basic Mac Pro even if it is a 2.0 Ghz model. You can upgrade the procs later. You can easily upgrade the HDD, RAM and graphic cards without voiding the warranty I think.