Just to follow up as you asked about the Q Acoustics 2020i
-they are an improvement over the JPW ML510s (which are no slouch either). The main differences I hear is that the bass is tighter (I have them on brackets close to a wall so have the bungs fitted, did not even try them without as from experience with other speakers anything less than a foot need something to dampen the boom). I also feel that they fill the room a little better. These improvements are not night and day, but subtle, and considering I wanted newer, slightly smaller and a more modern look I can say that I am happy and recommend them highly at the price I paid (149 euro)
The downsides- they are very deep alright, so the size saving isn't as much as I had hoped, in fact their physical volume is probably as much as the JPW, but in my set up they look better (and this was a consideration as I have them hanging in a very visible part of the family kitchen/living room side, not my main living room. Also they have a cut out at the bottom for wiring. This is great if placing them on a shelf or stands. For me it was quite awkward, as I wanted to place them on my existing brackets. These brackets clamp at the rear and fwd, but at the rear where you would normally tighten some screws, there was no part of the speaker to clamp against. It meant I had to make up 2 spacers to sort it, not the end of the world, but inconvenient