Do NOT listen to the above advice!
I am working on moving almost entirely to a MIDI controllers and Rack system. It makes the most sense on all levels.
You get controllers that you like the feel of (action, number of keys, pitch and mod wheels etc.), then you get the rack mounted modules that you like the sounds and programming of.
If you get tired of either a module or a keyboard you get rid of it, but still keep the keyboard feel/module sound that you like.
It makes the most sense financially, space and travel wise. Ever lug three or four keyboards to a gig? Ever lifted a MIDI controller? They are very light.
You can put a dozen modules in a single rack, carry that with one hand and a controller in a case with the other.
Sky is some kind of Casio enthusiast and wouldn't give you any advice that wouldn't work out with Casio. Casio doesn't make any controllers and they only put out one rack module. Therefore, to Sky, MIDI controllers equals bad. Never take any advice from this no nothing.
Next she'll be telling you that spending money on keyboards without speakers is a waste because you have to buy montitors and amplifiers.
Carl