Jim, as Graham posted get yourself down to Castle Cameras in Bournemouth to try out a couple .As well as the Hawke 8x42ED and 10x42 ED they also have some other brands to compare with.
My monocular is a bit of a different beast I bought it as a spotting scope but is great for bird watching when tripod mounted. Do a search on internet for PICCOLO COMPACT 15/30/45x ZOOM 60mm SPOTTING SCOPE.
I got mine off the bay for Β£33 used of course, I don't think they manufacture them any more