The Logitech G900 is my favorite mouse even though I lost the wireless adapter - The Verge
Logitech 910-004608 G900 Chaos Spectrum Wireless Gaming Mouse, 12,000 DPI, RGB, Lightweight, 6 Programmable Buttons, Long Battery Life, Compatible with PC / Mac - Black : Amazon.co.uk: PC & Video Games
4pcs Replacement Side Buttons G4+G5+G6+G7 For Logitech G900/ G903 Wireless Mouse | eBay