Slight problem is on the DST ship its not clear plastic on the front... so unless that changes there wont be 4.
I don't think that's necessarily as much of an issue as you might think it is. In the show, the plasma torpedo launcher wasn't really visible to begin with; it (the torpedo) just sort of appeared as a "blob" on screen moving toward the Enterprise, almost as if it came out of nowhere. DST could put the LED inside of the plastic and actually use the light bleed that we normally complain about to their advantage. Paint the launcher like the one that's on display, or mold it out of plastic similar to that used on the TWOK 1701, and it'd effectively be screen accurate. One of my only gripes with the Playmates version of the ship is that the launcher is that in–your–face reddish color that it never was anywhere else, and that after designing it that way, they didn't even bother to light it. I trust DST to rectify that issue, hopefully in the way I've just described.
Edit:
I don't know if it was the last, but it was certainly a good one. The detail was all painted on which was a lot nicer then stickers.
Edit 2:
The last ship was the Insurrection Enterprise E in 1998, the Romulan BoP came out the year before with the Defiant.
The BoP was definitely one of Playmates' better ships, and you're right, it was released alongside the Defiant shortly after their 1701. I find simultaneously funny and sad that the Enterprise–E was their last ship though; funny because not even the Enterprise–E could save Star Trek: Insurrection or Playmates' toy line, and sad because despite being a huge improvement over the FC version in some ways, the INS version was still sorely lacking, and we ahd to wait until 2006 for DST to do an accurate sculpt. (Not to mention waiting until 2012 for an accurate paint job.) Worse, the INS version had no excuse to be as inaccurate as the FC version designed from pre–production materials.