Probably you already have read reviews on some of the current models by Logitech. It seems none of them is good enough to replace the z2300. Your thread and responses from others prompted me to look for better satellite speakers for my Z2300 and I stumbled upon the Creative GigaWorks T20. Only $89 and lots of great reviews. The system pumps out enough bass and you don't need a subwoofer, I read. I thought I could use the T20 for travel, and I compared it with the iLoud Micro. Still, I am leaning toward the iLoud Micro. I uderstand that you specifically asked about the current Logitech model good enough to replace the z2300. I don't know exactly what your needs are, but have you considered the iLoud Micro?