Build a monster of a desktop for a quarter of the price of the laptop, and leave it at home doing the number crunching while your MBP has other purposes, you'll benefit the community much, much more that way.
Thank you for the advice.
However, I spent all my cash on the Macbook Pro - it will take some time to save up again.
Also, thanks to Sandy Bridge architecture, there is a quite tough competition between desktops and laptops - something that was unimaginable five years before! So I don't think it would be possible
to build a system that costs just a quarter of the MBP (near $600) and has a higher performance.
If we would take a look at desktop processors which have 4 physical + 4 logical cores (like MBP's CPU has):
the cheapest desktop i7 processor - i7-2600 - already costs 300$.
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