My experience with FM tuners is limited, but I have been collecting lot of information on reception problems and different types of antennas during the past few days. I guess the answer to your question would depend upon the following:
1. Which band are you trying to receive (AM / FM) ?
2. What are the stations you are mainly looking at, and how far are these? Are they all in the same direction?
3. What antenna are you using at present?
Some tips I collected from the Gurus in this regard:
1. For local or fringe-area FM stations, reception problems will disappear in all certainty with an outdoor VHF antenna. In fact for the "very local" stations, a properly mounted twin-lead indoor antenna would do.
2. No need to go for fancy options like dedicated FM antennas from Antennacraft or Wineguard available on Ebay India (through Cart2India) or 20north. A five element VHF (Doordarshan) Yagi antenna would cost Rs.300/- in the local TV shop. A cheap, 3' heigh camera tripod with three-dimensional rotation, lock, and bubble-scope is available for Rs.1,200/- on Ebay India, and can be turned into a stylish-looking terrace-mount for the Yagi antenna. It can also be used for DXing since you can alter the direction, zenith and elevation of the Yagi with the tripod.
3. Be wary of the claims associated with some fancy FM antenna brands, of pulling in stations more than 100 kms away. While under certain circumstances you may get such receptions, by no means, with the very best of the antennas, a regular reception such as this is possible. Also, as far as possible, avoid indoor amplified antennas, however fancy they may look. There is no alternative to the laws of physics, and snake-oil remedies do not work.
s Use a high quality, preferably quad-shielded, RG-6 cable to connect the antenna to the tuner. Connect using a proper connector, and the best that can happen to you will happen.
I hope these tips would be of some use to you!