TPMS is a luxury. The B requires you to do a burpee to check the rear. Great for the health conscious but I try to avoid much time with my knees on the concrete.
Bluetooth is all the rage but I prefer a hard-wired system that doesn't rely on a phone.

http://www.mcssl.com/store/rrr-tool-...5mm-valve-stem
This is the upgrade to the original, there were some lessons learned that were fixed in V2. I've used Orange on the B and my previous ST1300 with no issues at all.
V2 has battery monitoring and lots of other useful functions. Also nice that replacement sensors are easily available now.

Considering your humid location a beaded seat cover might be nice. I can ride all day on mine with no sweat issues.