rust me. Do NOT buy the Logitech speakers. They are absolutely “”””NOT”””” suitable for live performance. I’m actually rather annoyed that people here recommended them to you because by hell is that bad advice.
They are nothing more than cheap Desktop PC speakers, so forget about them.
Obviously, you have never used or heard the Z-2200/2300 system. There are a relatively large contingent of pros out there using them and all have reported excellent results. They're using them night after night, and everyone that has used them also receives rave reviews from their audiences as well. Yes, they were designed for PC usage, however, there are lots of systems that were designed for music applications that are not suitable for entertainment applications. As I stated in my response, it's not the size of the speakers that count--it's what they sound like. Keep in mind that one of the most incredible systems available, the Bose PAS system, utilizes several tiny speakes contained within a sound colum. Ironically, those speakers are even smaller than the Logitech speakers.
The bottom line is let your ears be the judge--not the hyped specification sheets and graphic charts.
Good luck on whatever you decide upon,
Gary
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)