It might be interesting to consider a Roland FA-06 together with Varranger or with a BK-7m. The FA-06 has a fantastic low weight of 5.7 kilograms! Or, better, a MoXF (7.2 kg) plus BK-7m. In both cases you get large complementary soundsets, more than one mid-range arranger would offer. (FA-06 with free EXP expansions offers different sounds compared to BK-7m). And the total weight remains lower than that of a PA-900 or BK-9 (BK-7m is only 1.7 kg). Disadvantages of BK-7m are quite weak acoustic guitars (also in styles) and lacking convenience when editing things.