i think best would be using a motor dish.. as we are seeing more and more channels are moving from one location to another... so motor dish would be best way to go..
you can get 110.119 and 118.7 on one dish which must be at least 30" and 2 lnbs 1 for 110 and the other for 119 and 118.7 ( this is a special lnb about $20) you will need a second regular dish for 148 with single lnb
The easiest, most practical and esthetic benefic way would be to go with a Toroidal 90 and the required LNBs (C/Ku band). I have it and I'm super happy with 91, 97, 110 & 119. I'm looking to add 118.7 and wonder if I can stretch it for 148 (They say you have a 40 degree span for birds but I heard of others stretching 50 degree +. I tried the thing with the motor, but it's totally unreliable, hard to setup and the wait time going through channels on different birds is forever. My 2 cents.
i went to the store to get a dual lnb but the guy said its only if u have more than 1 receiver, its to connect 2 receivers to one satellite he said it wont help in getting more channels, is tht right? right now i have 121 and i m not getting all the channels
"Dual will get you 2 output to connect 2 receivers not more channels. Think of a longterm and get dual."
Vittu, I tend to (partially) disagree with you; A dual LNB can get you more channels: A Circular Standard Dual output LNBF with Dual polarization can get you Echostar 7 (Dishnetwork 119°W) and Anik-F3 (at 118.8°W) in addition to hook up 2 receivers, therefore: more channels.
Dual LNB = 1 sat and two receivers Twin LNB = 2 sats and one receiver (often used with 110/119W or 82/91W) Dual twin = 2 sats and 2 receivers. "Dual output LNBF with Dual polarization" Universal LNB is specific version of a dual twin designed for 118.7W and 119W
A Fortec dish 30" 33" 36" with hh-90 motor and INVACOM universal LNB QPH031. Good for Echostar 3,6,7,8,9,10(1,2 in mid and coast west), Nimiq 1,2,3, AMC 3,4 , Intelsat 5,7,8. This is the best for have max channels, but you may listen 2 receiver on the same satellite only. I have a second dish 20 inch with motor and circular LNB for my wife.
You can get all the Birds in the Arch with this setup. 
