Ideally neither, a new PC is in order. However, the G41M-VS3 has only 10/100 Ethernet, the G41C-GS has 10/100/1000 so I'd go with the latter.
Ah very well... for right now i will buy the G41C-GS as a temporary system. then i will upgrade to a newer system when i have the money for it. i will then use this as a secondary PC or sell it for cheap. well thank you very much you have convinced me its time to upgrade from my ancient tech