thanks for the advice, very interesting reading.
TS series too many bells and whistles for my needs and also, TS much more expensive here in Sweden, twice the price of equivalent TX at $400 per speaker. This is nudging into the territory of the big boys, QSC, Mackie, JBL, Yamaha etc so I'd go for that instead. I think TX308 will be adequate at $200 each, now that you all helped me figure out the cables.
Will only use additional mixer/preamp if absolutely necessary, want to keep it simple for home use, single keyboard into two speakers directly.