any modern system would be fine.
just make sure it has a Nvidia graphics card.
and preferably a Intel processor.
AMD processors work as well but FreeBSD (and with that PCBSD) is i386.
AMD processors use RISC internally so it would have to convert all i386 commands into RISC commands, which, obviously, slows the system.
(AMD processors are actually way faster then Intel, but only with native RISC software, most software is i386/i686 which will make the user experience them to be slower)
Personally I use a Toshiba Satellite L550D-11n, which has a AMD CPU and a ATI graphics card.
it works fine with PCBSD, but I don't have full hardware support, and no 3D acceleration on the graphics since AMD doesn't make BSD drivers (NVidia does)
Last edited by foxofinfinety; 04-26-2010 at 10:19 AM.