If you have a southern house, you'll have a good view of the arc so satellite options would be good. My house is facing south east so i'm limited for western but I can get 30w hispasat no problem then I can easily get 39e but anything past this is a little difficult due to houses but still get some channels on other sats past 39e.
Use this site to see what sats are possible - put your postcode in and drag the pointer to the exact spot on your house where your dish is going then use the drop down menu to choose a satellite and there's also an obstacle tool on there which will tell you what your line of site above other buildings and trees etc. needs to be >
http://www.dishpointer.com
If you have a look on Lyngsat for channels then see what sat / beam the channel is showing on, you can then check on
http://www.satbeams.com/footprints to see if the beam is receivable where you are and tell you what size dish is recommended for that sat / beam.
I originally had my motorised dish plugged into the zgemma but it kept losing power to the motor (they like certain lnb's to work) - I was thinking of changing the lnb on it but when I started playing with the zgemma to add additional bouquets etc. it just looked too busy for every day use so I purchased another receiver for use with the motorised dish... it's only for the football really but serves its purpose. I have found some of the missing channels but the likes of SS4, 5 are only on 28.2 so you can't get them on other sats. S*y 'Sport' News is on 19.2e but I should imagine it will only be in German and probably covers mostly German sport (different program schedule to that of SSN uk).