So I just had a few brief comments on the BKR9000. My SAR team purchased several earlier this year, overall they are working well. The biggest gripe from several folks is battery life. The battery seems to last about 12 hours (when scanning a few TG's on a trunked system), and there is currently no option for a higher capacity battery. And, it's a fairly expensive battery. BK advertises it as "Super High Capacity", which it is absolutely NOT. (My XTS and APX radios all run high capacity batteries which last much longer than 12 hours, if you aren't used to doing this it may not matter as much to you). One would hope BK will provide more battery options sooner than later.
I've also heard several reports that it goes out of range in a few fringe coverage areas (P25 sites), when an APX 6000 sitting nearby still functions. Granted, this happens pretty rarely. (I'd be very curious to hear comparative coverage reports from others using it on their regional or state P25 systems).
I do love the fact that the BKR software has a "firewall" between the core trunking features and everything else. Basically, you don't need a system key to change any menu/button settings or modify the conventional side. You only need a system key to modify the actual table of talkgroups, and the core trunking parameters. I've also gotten great feedback about the command zone feature; the ability for each user to build their own zone of both trunking TG's and conventional channels is really awesome. I've also gotten great reports on audio quality, the internal speaker is phenomenal.
I do hope BK steps up their game on offering more accessories, such as RSM's with channel control. In fact, I still prefer my ancient XTS 5000 over the BKR because my XTS has a Commander II speaker Mic with a channel knob, as well as a higher capacity battery that lasts about 2 days. I am little surprised BK didn't design fully functional RSM's from the outset, given the XTS series and Commander II speaker mic have been around for 20+ years, to say nothing of the APX products that came afterwords.
In fairness to BK, they did include voice announcements which we utilize, and that feature does work well. My biggest hope is that BK offers more battery options and more accessories, sooner than later. I suppose only time will tell...