I'm looking to get a cell phone amp for when I go out into the rural reas where cell reception is poor. I think I have chosen this amplifier (http://www.wpsantennas.com/index.asp?PageAction=VIEWPROD&ProdID=375) paired with this (http://www.alternativewireless.com/cellular-antennas/wilson-antennas/wilson-dual-band-antenna-magnetic-mount.html) antenna. Now, my question is, can I use a slightly higher gain antenna on the inside of my truck than the little small stealth antenna it comes with to gain a little more than a 1 foot range on the inside antenna? I'm trying to get improved cell reception throughout my entire suburban, but I don't want to cause oscillations that will shut the amp down. Thanks.