I'm a non-tumbler myself. IMHO, cleanliness of the glass is moot and should not detract from its price, but to some it does. As diggers and hunters we know that "Not all things that shine is gold". A bottle can look good and be pleasant to the eye, but not worth much. Some bottles don't look half as good as others that are worth thousands. Honestly I'd NEVER tumble a bottle, I won't take that risk. Collectors know the value of bottles regardless of their outward appearance.I have to give you the standard warning about tumbling bottles - if you ever plan to sell them, some collectors love tumbled bottles, others wont touch them.
Do whatever YOU want to do.