Hi Dee,
Whats your budget range? Most furnished place around westlands, waiyaki way range from 100,000 for a 1br to 180,000+ for a 3 Bedroom furnished flat.
If you're looking for affordable try Madaraka estate. You can use Mbagathi road or Uhuru highway to get to Westlands in 10 to 20 minutes and the rental prices are much better. 60K to 85k for a two bedroom.
Holla if you need some assistance. karibu @ natakanyumba.com
And its just as secure with more parking than anywhere that close to Nairobi CBD
cheers