Spindle will be fine for me, I'm using a 0.8kw air cooled on the 300 x 300 Isel router I have at the moment. I have a spare 2.2kw water cooled spindle but that's over kill.
My main use of this will be larger engravings and getting more than one piece on the bed at a given time. Over the next two years I have 1500 makers plates at 150mm diameter with a shed load of text and logo's on them to be called off monthly.
The Isel works fine but it's the only router I own, nice to have a backup.

I had spotted the unsupported rails on the Y and with a small spindle they are probably fine but even an upgrade to supported rails will only be 40 odd quid or so and I'm geared to any alterations.

Thanks Geoff for your views, given the price I don't mind the odd hiccup, I keep drivers in stock anyway so if one went I'd replace the lot with something I know and have pluggable spares.