I've never had a BJ... Errr, a Black Jack.
Anyway, I can Tell you what I like about my Q9H and you can see if anything resonates. The keyboard is really nice for a mobile. The speaker on this thing is incredible. Whether for watching videos or for speaker phone, I've not heard such a loud and rich speaker in such a small device. It also makes for a nice loud ringer. It's made me an Opera believer. The GPS and Live work great together (just be patient enough for it to get its initial fix!). I get about 3 days out of it with 3G on and syncing every 15 minutes during the day and every 1 hour late night. Real time blows on ATT because they refuse to provision their network correctly, so the WM phones sync every 5 minutes. I'd imagine push working correctly will do even better with the battery. Oh, I should note that I have the extended battery. I've not used the standard battery since I got the phone, because it doesn't affect the footprint in a bad way, IMO. It has an extneded battery.
I get good reception with this phone. It's been very stable.
Things I consider negatives are, it utilizes a multipurpose mini-usb port. So no headphones and charging without a splitter. You wouldn't think it'd matter that much until you realize that you can stream your favorite radio station while you are at work. Despite having a standard port, it only charges with Motorola chargers. I've had a hard time finding a case I like, but I haven't looked in the past 6 months either...
Hopefully they will release 6.1 soon!