If you really want mechanical, and silent - Then just find a keyboard available in Cherry MX Browns or something for the keyswitch. Stay away from blues. You can look up the different keyswitches, but I'd just get brown and then unless you can master not "bottoming" out your key press, you can stick O-rings underneath the keys, but they can expensive enough I believe. If you want to fit within budget, I'd recommend something from Cooler Master or Corsair - the keyboard only companies are rather expensive. £100-150 is should be fine. Its the mechanical keyboard that will drive that up. Mice aren't overly expensive for the most part. For palm grip, I think the obvious choice is the Razer Deathadder (the only thing Razer have done right), or, if you'd like a Logitech gaming mouse, because the Deathadder seems to be stuck at a high price at least on Amazon. For your monitor, you will probably want a 24", seems to be the sweet spot, 1080p, probably TN panel (which is almost all of them). That would be reasonably cheap. If you have cash to spend you can always look into 1440p with IPS (27") or a gaming monitor with say 120HZ refresh rate (although I deem that a poor choice unless you are a professional gamer). If you go with the 24", I'd personally just find the cheapest one from a reliable brand name that seems to have a decent reviews.