Not sure what your budget is but I went with a Zipp Service Corse SL stem at 120g and an ITM Pathom 2 bar that came in at 207g. I have since stripped the clear coat and logos off the top of the bar and it now weighs in at 198g (should have done the whole bar but I was tired of messing with it). Cost for the bar was $185 tho. Ritchey WCS stem weighs in right around 120g for a 100mm w/ ti bolts (bought bolts separately-are now in my Zipp stem).
Lots out there on ebay once you have an idea of what you want. Might be worth doing the stem first and then saving a little longer for a nicer/lighter bar.
From my understanding, the Zipp SCSL stem came with ti bolts off the shelves.
I leaning towards the Zipp Handlebar( short/shallow) after a test ride on those bars. But the 3T's new arx2 stem looks almost like the zipp but supposedly lighter than the zipp.
It seems like the 3T seatpost does not come in the stealth look, I'm looking for which is quite a big disappointment.
I'm using Arione tri-2 carbon (not doing tt, just a personal perference on the saddle) on my current bike which means i'm unable to use most of the Ritchey seatpost due to their clamp design.( as my LBS tried to fit my saddle to a Ritchey seatpost but failed)