Hi Jo.
You probably wouldn't enjoy imaging through the 102 very much as you would get quite bad blue halos around the bright stars. If you can get an ED80 then you will be on a winner. With the ED80, your 102 for a guidescope and an EQ6 or HEQ5 for a mount (try to find a ToUcam for autoguiding) and you will be up and away.
Oh plus a few little accessories like an illuminated reticle to use for guiding if you don't get a ToUcam and a camera T adapter to attach to the Orion.
Welcome to the bottomless pit
