Miss Manners says you never reject gifts, just accept them graciously and give many thanks. So, from that perspective, yes, take it!
Computers are so cheap nowadays that you can't go wrong it seems. I say PC so that you're compatible with me hahaha, but it's really up to you. If you're serious, you should write a detailed journal about what your needs are the geeks will come out of the woodwork to help you out. My rule of thumb for all machinery is if in doubt, buy Japanese