41 pounds mechanical keyboard, I assume u live in EU .
http://www.amazon.co.uk/367/dp/B0112GMMME/ref=sr_1_3?s=computers&ie=UTF8&qid=1441838384&sr=1-3&keywords=lolita+spyder
38pounds hyperion
http://www.amazon.co.uk/Logitech-G402-Hyperion-Gaming-Mouse/dp/B00LFBEOUA/ref=sr_1_1?s=computers&ie=UTF8&qid=1441838717&sr=1-1&keywords=logitech+hyperion+fury
10 cheap rocat in ear headphones with mic
http://www.amazon.co.uk/Roccat-Syva-High-Performance-Headset/dp/B00IPDK2B6/ref=sr_1_1?s=computers&ie=UTF8&qid=1441838632&sr=1-1&keywords=roccat+earphones
9 pound big mousepad.
http://www.amazon.co.uk/Swift-Gaming-large-mouse-pad/dp/B00XIEMSN2/ref=sr_1_3?s=computers&ie=UTF8&qid=1441838527&sr=1-3&keywords=large+mousepad
41+38+10+9=98.
p good deal if you ask me. also there are other equality priced gaming mice on the market like the g302.
also I assume you mean 100 pounds not dollars because u linked co. uk
edit: another good mouse options http://www.amazon.co.uk/Roccat-Hybrid-Optic-4000DPI-Gaming/dp/B007MPVRQC/ref=sr_1_1?ie=UTF8&qid=1441839186&sr=8-1&keywords=roccat+savu
2 pounds more but optical sensor.