Why are you bothered about the taxi fare? Wouldn't you be expensing it?There's also the Heathrow Express from Paddington - sometimes a better option to avoid traffic congestion.Your obvious option is W London - obviously depends on budget and tastes where exactly. West Ken, Hammersmith, Ealing and places up the Bakerloo line (Kensal Green etc) are all handy for taxis to Heathrow and / or connections via Paddington.