need to buy a new mouse. Wireless and 5 buttons, ++ for built in charger. Also want a small wireless keyboard but I can get seperatly...

is bluetooth best? or one of the non standard 2.4hz types?
Id like 3+ meters of range

Ive looked at all the main brands, but they are £££££ compared with a couple years ago.. maybe because the the flood of small laptop mice..?