Is there similar cabinetry in the kitchen?

Yes- Lugarno knobs and pulls from RH in satin nickel

I agree. The knobs aren't doing that beautiful unit any justice. I think you need something bigger/beefier. I would think you'd want these to stand apart, and look more like furniture than kitchen cabinets. So I would buy hardware that makes a statement. Maybe when the doors are closed, they form a design. Or if you want to add a pop of color- glass pieces. It all depends on the look you are going for in the room.

It looks like you are going for a traditional look? Consider pulls throughout. Top Knobs has a traditional pull...the Chareau Emerald Collection that comes in many lengths...12", 9", 7", 5", 3 3/4". I would place a 7" on top starting at the low corner and a 12" on the bottom door starting at the top corner. Or, possibly a 5" and 9". The use of these vertical pulls mimics the long, vertical aspect of the doors and are proportional to the overall length of the doors . They become a part of the style, not just a piece of hardware to open a door. Then the longer of the two on the drawers and the next size down from the shorter one for the doors under the TV.

long bar pulls would look great and are affordable and accessible.

Where did you get your amazing wall unit? I am trying to find something similar for our family room. I agree with the longer/bigger pulls.

If it's not too late I would not centre knobs on cabinets - leave them in bottom corners instead. I also don't think Gilmore knobs are interesting enough - they look rather generic. Perhaps something with more personality? Westwood and Maddock are very attractive...