Well, isn't it the motherboard cutting out, rather than keyboard and mouse?
If you want quiet, don't go with mechanical, as they are noisy. I'd settle for a Sidewinder X4. TTSport Challenger Pro should be all right as well.
For a mouse, depends on budget and type of mouse you like. Big or small. Then either the SteelSeries Sensei RAW, or the Mionix Naos. In the cheaper range, the Xornet (small), or the G400 (palm grip).