I just have a question for the o p, is this your first scanner? Was your last scanner decades ago before trunk tracking was developed?For value I'd suggest the BCD996P2 (mobile/base) or BCD325P2 scanners. The TRX-1 is also a good choice (especially if you want to record and playback later) but at slightly higher cost. All (3) scanners are capable of P25 Phase 1/2, DMR & NXDN modes -- the Uniden scanners require a paid upgrade for each of those modes however. The TRX-1 has support for all three out of the box.
IMHO, I believe the Unidens are easier to configure and set up. If you've never done it before then it can seem daunting but it's really not that complicated. The P25 mode handles just about everything for you. All you need is the control channel frequency of the site you're monitoring and you're essentially done. Then you can let the scanner run and find Talkgroup IDs (channels) which you can later add friendly labels, etc.
There are plenty of videos on YouTube on how to configure these scanners and for the most part they're the same -- with subtle differences in the software used. For the above Uniden scanners I'd recommend using FreeSCAN (a free 3rd party software package.) There's also paid 3rd party software which may have more features, etc.
(And yes a [Windows] computer is required to program the scanners these days. For the most part it's a one time configuration of the scanner.)
I highly recommend learning how to do it yourself. It makes the hobby more enjoyable and you'll become more proficient in how your particular scanner works.
The newest line of Uniden scanners are very expensive and their programming is completely different. If this is your first scanner then I'd recommend one of the above to keep your investment costs down