Hi Mary!
I used to have a few big fish tanks that kind of 'owned' me like that and a hobby farm--I gave the tanks and all the stuff away, well and the farm too,
sometimes I miss it and now I am just owned another way
Your pond sounds nice though...don't I recall some beautiful pictures of it and your yard and a raised rock garden bed around it and kind of a stepping, meandering waterfall of sorts? Gosh, it would seem a shame to wreck all that...but I am sure you could turn it into a fabulous rock garden too, sans pond.
Is there some reason you couldn't have both?
I might be miss-remembering your gardens, but you might be able to modify around your pond and create wonderful places for fascinating alpines and other rock garden treasures...maybe try that for a while while you agonize over major pond removal decisions?