TL;DR: Here is a picture comparing the size of an 8030C and 8020D on a 30" desk. I am posting this in case anyone else is concerned about the physical dimensions of the two models. I found it hard to find images of the monitors on desks when I was doing research.
Two weeks ago I ordered a pair of 8020D with the matching Genelec (K&M) stands. I was intrigued by the 8010A but wanted something a bit larger with deeper bass extension. I had considered the 8030Cs but was afraid they would be too large looking on my desk. Over the last seven or so years, I've had pairs of PSB Imagine XB, KEF Q100, Audyssey Lower East Side Media, and Dynaudio BM Compact MKIII on my desk. For the last three years, I've been running a pair of Peachtree Audio DS4.5 with a Parasound Zamp v.3. After recently running into some issues with the Zamp, I decided to try a pair of active monitors.
The reason I'm writing out some of my speaker history is that I've had small and relatively large speakers on my desk. At this point in time, I'm looking to avoid having 12" or 13" tall/deep speakers taking up lots of space on my desk. Also, I don't love the look of large speakers flanking my monitor. In a future desk set up, I could see getting larger monitors and putting them on stands behind a desk.
Anyway, after a day of testing the one 8020D that was shipped to me (the other hadn't shipped), I decided I could handle a slightly larger monitor. I also had some buyer's remorse as the 8030C is supposed to be the most popular model, and the 8020D seemed a bit forgotten between the 8010 and 8030. I canceled the 8020D that hadn't shipped and placed an order for a pair of 8030C–also with the matching/corresponding stands.
As I already had the 8020D on my desk, I figured I'd compare the two sizes. Here's a picture of both on my desk. Because Genelec monitors seem to have relatively shallow physical depth compared to many other active monitors, and have rounded edges, I think the 8030Cs are a great size on a desk. Not too big, not too small.
Once I get my stands in a week or two, and have some time to really test the speakers, I'll post a review of the speakers.
View attachment 117110