Hey SSFG forum. How's it going? Everyone doing alright? Alright.

I recently picked up an All-City Big Block for commuting to complement my road bike and my tourer. Riding fixed has been a whole lot of fun; Tokyo is flat enough to not really need gears.

When I'm standing up, I notice a fair amount of flex coming from the stock bars and stem. I was wondering if I'll notice a bigger difference in stiffness by replacing the bars or by replacing the stem. Thoughts? Also, any recommendations for stiffer stems or riser bars?

Thanks!