G'Day!. Well i did it. Tried out the binos in the shop and found i could see relatively comfortably at 60x, so decided to go for it. Used my usual local landmark at home for focussing the left anfd right eyepieces individually, seeing as my eyes are not evenly matched *sigh*. Murphies law says it's overcast, so can't have to wait for my first sighting.
Had a reply from Andrew, the writer of the Virtual Radar Server prog, who has put me right about the delay re showing my sbs detected aircraft on his map. My fault entirely. I didn't realise that the initial SBS1 software had a 5 minute delay at the transmit feed port 30003. This has now been adjusted to 'no delay' in other words live, but entailed upgrading the software to achieve this.
I have now upgraded and all is now well. I am now using Andrew's software in place of the default sbs screen, which i find much more attractive and includes all the information that i could posibly want in front of me.