"Ballpoint" you ask? What you ask makes most internet pen people (especially FPN peeps) roll that side eye. I love the ballpoint, grew up on it, not the fountain pen, and not the gel pen. Ballpoint is "oil" ink, Fountain pen (and rollerball) is "water" ink, and Gel pen is "gel" ink. If you already knew this, sorry you can disregard everything I just wrote. (tho it's interesting to note that many people of FPN have no clue what the differences are, and totally dismiss anything that isn't Fountain.) But hey, I do love my Vanishing Point and my titanium Bock nibs.
I'm going to assume you are asking specifically for "ballpoints". Ballpoints have gone thru changes in the last decade. They come in hybrid form where the oil is mixed with another ink, to create a richer writing ballpoint. Your pen, the PENTEL SUPERB BKN77, I believe is the older ballpoint ink.
I am a designer myself, tho I don't have a preference for sketching, most of my design is digital. But I do have a fascination with pens for handwriting and lettering specifically brush/fude pens.
It might be worth noting to you that PENTEL makes a pen that uses the same Body as the SUPERB and they call it HYBRID:
I love the SKB-1000. I only have the new ones, not the originals. They are definitely "hybrid" ballpoints you can find these easily on ebay. But I don't find them as high quality writers:
If your still looking for "ballpoints" I would suggest the "hybrid" ballpoints from the 4 major brands: UNI: Jetstream, PENTEL: Vicuna, PILOT: Acroball, ZEBRA: Surari. My favorite is the Zebra Surari, but most people on the internet have a "thing" for the Jetstream. I think each has its strong points depending on point-size. I recently favor larger point sizes then tiny scratchy point sizes:
If your not asking specifically for a "ballpoint", I would try a Pilot HI-TEC. It is a gel pen with a needle point:
It really depends what you are sketching/drawing/writing, as I could go from a Pilot HI-TEC to a Fountain to a Kuretake Cocoiro, to a Tombow Fude depending on the mood.