Donny: I just found out that the Tyros satellites speakers deliver 20 watts per channel and that its sub woofer delivers 40 watts per channel. This totals much more than my PSR2000 delivers so it seems like sufficient monitoring volume (to me). The Fender (20 lbs) is basically the same weight as the Tyros sub woofer plus the 2 satellite speakers. I think the avantage of utilizing speakers mounted on the keyboard facing you is that it offers more accurate mid-high frequency ear level monitoring which the Fender (if situated on the floor) could not provide. I think the increased time it would take to setup & attach the Tyros speakers compared to setting up the Fender unit is probably pretty marginal: 30 seconds at most, especially if you leave the mounting brackets attached to the KB, allowing the little satellite speakers to easily slide and lock via a convenient clip/lock system.

For those situations (very small rooms with very few people) where I still want to utilize the kb's built in speakers for BOTH monitoring as well as providing the main sound to the audience, I'll continue to take the lightweight 24 lb PSR2000.