Ok i think I have an idea of what your seeking. you really have three choices and the first two are a coin toss. Your first choice is this:
DJI Inspire 1 Quadcopter with 4K Camera and 3-Axis DJINSPIRE1 B
this is a model B which means it was produced early 2015. the Inspire 1 went through 4 revisions A B C & D with very little difference. The biggest difference was in the attachment of props and the landing gear retractor linkage engineering. This package they are offering includes the updated prop attachments and they're throwing in a 15 dollar device hood. Truth be told the retractor linkage design change was a change in manufacturing efficiency and the B model is actually a stronger design. The next choice which is a coin toss to the first is this :
DJI Inspire 1 Quadcopter with 4K Camera and Inspire 1 3-Axis Gimbal B&H
This is a version D which is the last version of the Inspire 1 and is identical in all ways to the B model other than the aforementioned retractor linkage and they're not throwing in a 15 dollar device hood. The advantage of both of these choices is they allow you to purchase two TB48 5700mAh extra batteries at 199.00 each and stay below your 3000 budget. You would have three batteries, the TB47 which is 4500mAh and two TB48 5700mAh.
Your last choice I see from what you've described as criteria is this:
DJI Inspire 1 v2.0 Quadcopter with 4K Camera and CP.BX.000103
This is the Inspire 1 Version 2. Basically a PRO without the micro four thirds X5 camera. Before I extol the virtues of the improvements made the biggest advantage of this version is that it grants you the opportunity to upgrade to the X5 camera when your budget allows. The differences over the prior models are the following, more powerful motors, more advanced prop attachments, landing gear extensions(for future camera clearance), A larger and more stable gimble (designed for the X5 but included for use with the X3), more powerful transmitter in the remote control (model # ends in C), and if provided as promised a more powerful transmitter in the aircraft (the FCC ID will end in 1510) I include the language "if as promised" as DJI has had what seems to be a manufacturing issue as it has been found that there are some V2 and PROs that were manufactured with the less powerful transmitter of the prior model. Whether DJI will make good remains to be seen however B&H has been beyond reproach in the handling of such situations so I wouldn't let it influence your decision on which model to purchase.
The only other request you mentioned was the inclusion of a case and every Inspire 1 includes a quite capable case. I would buy more aircraft before I considered an upgrade of the case. I own a GOPRO landing mode case and use the factory case with plans to sell the GOPRO as its just too dam heavy. I'll add that although you were clear on budget if the PRO is at all a possibility go for it you won't regret it. Good luck and enjoy your new purchase as you really cant go wrong with any of them especially from B&H.