Options for boosting signal over DSL/live match for Xbox 360

I have DSL and where I live we do not have that choice (I live in a rural area and do not have the option of cable). I have a NETGEAR WN2000RPT wireless extender I use to connect to Xbox Live. The extender tells me if I have restricted internet access though (i.e. red light for restricted NAT or slow internet and green for okay). Currently, I connect to a netgear wireless router and have been for awhile. Until recently, when I changed the router and DSL filter it was restrictive and giving me red lights for the internet connection same as the Xbox 360. Sometimes, the Xbox 360 would be green on the NAT test while the wireless extender was red. So, my question is what can I buy to get the most out of my DSL connection? In addition, what are some suggestions of top Satellite providers or alterative forms of internet connection for rural areas around KY and south if it will not.improve my speed much? Notes about connection: 1. ADSL from what I can gather. 2. ISP AT&T(no choice because ATT owns the road I am on and no other ISP will deal with us). 3. Tried a while back to ask for a phone line replacement for our road because we are 5 minutes from a major highway and AT&T gives us the runaround they will upgrade the line but does nothing. 4. Connection speed: 1.5 mbps.