Indoor exclusively? In general, the cardioid condensers that can work well indoors are typically mostly under $1000; it’s the shotgun mics that usually “get good” around the high hundreds to low thousands - the sort of “industry standby” shotgun mic, the Sennheiser MHK-416, typically retails for exactly $1000. For comparison, Rode’s angle is typically good value-for-cost, and the NTG-3 compares well for what you pay.
To explain the smaller cardioid condenser mic vs a shotgun mic - basically, a cardioid condenser like the NT5 has a wider range in which it picks up sound, which can make it more forgiving for shooting indoor scenes - provided the environment is quiet and controlled. The advantage of a shotgun is that its narrower, more focused range can be used to cancel out and minimize environmental noise in noisy interiors (like big, echoey spaces), or outdoors - at the cost of a forgiving mic; once a shotgun veers a little bit off-target, the sound quality diminishes pretty quickly. So I’d consider your potential shoot situations - you can use a shotgun indoors in small spaces (but your accuracy has to be better). The most versatile compromise may be something like an NTG3 plus an NT5 as an alternate option for indoors?
Also just FYI, I’ll sometimes test-roll on location and compare two mics - have someone (anyone; doesn’t need to be an actor) talk, clap, and yell in the shooting space so I can quickly record two files and then A/B compare the playback to see what’s working best. The above are general guidelines from my experience, but every now and then the results will surprise me and go against what I may have assumed was the best choice.