No problem. You will find that even though threads do meander about and touch on various tangential topics all the time, however, if you are looking for a specific answer to a question like "which backhoe?", you will get a much better and faster response if you ask the question in an appropriately titled new post.
For example, you may get only my opinion on this thread as some guys will not read a thread about "DaeDong 81Yr Tx" but they would have responded knowledgeably and promptly to a question about backhoes for a DK45s.
For what it is worth, both Rhino and Kioti sell very fine backhoes. I presume you are looking for a 9 foot BH with a subframe. I have a Woods BH90x on my DK40se which I am very happy with. Kioti makes an 8.5 ft KB2485 which is excellent and has a different style subframe. Rhino products are excellent generally. Bobcat sells their BH for Bobcat branded Kioti/Daedong tractors and I know people have been happy with it. If you are buying used just make sure it has been properly greased so you will not be replacing bushings ($$$) and also make sure that the subframe fits your DK45s.
Good luck.