AllSouls,
One of the advantages of dealing with Moog Music is that they are THERE and they stand behind their products. If there is a problem with one of their theremins, they will fix it. I know of many people who have had trouble purchasing instruments from small, relatively unknown, foreign manufacturers. A number of the ones that existed just a few years ago have gone out of business, so parts and/or repairs can be tricky.
I have always been a big believer in: If you don't like the sound of your theremin, change the SOUND not the THEREMIN.
With acoustic instruments you're more or less stuck with what you have but with electronic instruments there are many things you can do to radically alter a tone you don't like.
"The theremin is an entirely electronic instrument and it is totally at home in the electronic environment." Bob Moog in ELECTRONIC ODYSSEY
It's great that you are now actually playing.