Hi!
here are some answers to your questions:
I do not know the exact weight of the Abacus but it should be in th 30+ range mainly due to the wooden cabinet and the two woofers built under the keyboard .Also the front panel is steel and not plastic.I can load it and unload it myself from the car -to the trolley -to the stand and vice versa.The Icarus is built in quite smaller and lighhter aluminium case without the woofers so the total is 20kg.The Icarus has only mid-high speakers build in (though not exactly visible!) and there is a separate sub woofer that can be connected.The internal speakers have their own output channel with volume and EQ -amd there are two more stereo out channels that can be configured saparately.
The Icarus comes with 194 styles each with two intros-two fills/breaks/two endings and four variations.Each style has two drums tracks and 5 instrument track that can use any of the available sounds be it OAS ,VST inrtument or even external module via MIDI.The number of styles that can be loaded on the 40GB internal HD is practically unlimited but the current limit for the styles that can be stored in the OAS database is 2000.On the Icarus there are also 50 'RealDrums', that is styles where the Drum track is an audio recording of a real drummer palying.OAS databease can hold up to 500 realdrums.There are 2000 one touch settings - 'Advance Total Presets' in the Wersi language.One Preset can store many settings and if you wish may recall a Style/SMF/Wave/MP3( but not the other way round).There is a 'quick edit' page for changing the sound selection/mix/transpose etc for a sequence and an equivelant one for styles.To further edit/create styles/sequences there is a 'touch button' that takes you to Steinberg Cusbasis.A nice thing is that you can edit the sound mix for a style/sequence live,while you play and save it without having to stop.Also it is possible to assign any(or all!) of the 16 tracks of a SMF to the volume sliders and control the mix in real time.
Instead of Multipads there is a number of so-called 'effect buttons' that replay a wave file from the disk .Apart from the factory supplied sound-effects wou may record anything and use it under an effect button.Yes,you can record audio -either using the 'Digital Tape' i.e recording everyhting in stereo as you play and sing or of cource use any Windows software to do more detailed work .Wavelab-lite is preinstalled as well as a CD Rewriter.You may use the audio recording facility to record any sound and use it a 'drum instrument' in the 64 progammable drumsets. A nice detail here you may use two different drumsets in the same style at the same time.Yes, practically most Windows software can run (allthough it may void the warranty)because these instuments are build around a normal PC.I have tried NI Kontakt and absynth and Wersi themself sell a special version of NI B4 that can be controlled via the keyboard's sliders.