I did indeed add the Pinball Refinery's lit Klingon ship and it looks great! The ship's LED block is tied into the left asteroid's flasher and does hide a bit behind the asteroid itself, but I highly recommend it!
Quoted from Cheeks:I just snagged one off of ebay for $36 w/ free shipping. This is the cheapest I have seen this ornament. That said, I would definitely add the hallmark Enterprise to a Pro, but I don't see the value in adding it to an LE. I have STLE and I was expecting more of a difference from the comments. The Hallmark ornaments are huge improvements over the STTNG ships, but only marginally over the STLE ship. The Hallmark Enterprise is a little more detailed than the original one in the game, but not very noticeable from the player perspective the direction the ship is installed. Plus, the Hallmark Enterprise is quite a bit smaller than the stock ship. I'm probably not going to put it in my game. I am considering either the Kelvin or one of the Klingon ships though.
I added the Hallmark USS Kelvin to my STLE and liked it very much. So far I am only keeping it down with museum putty (works great and leaves no marks but dies not look fantastic) but will try and bracket it in.