What do you mean by a 'decent price'?
The NS-1000M is one of those world-class products that, at the time, was something quite exceptional. I'd like to find some in the UK at what I'd call a decent price!
Do check the foam-rubber surrounds though, or factor in the cost of repair.
The sealed-box design, somewhat rare now, can give much more accurate transients and phase response than a reflex enclosure of similar size. This can be to the detriment of overall efficiency and absolute LF extension. (However, The NS-1000 is large enough for those things not to be a serious issue.)
The CR-1000 would be an ideal partner IMO. Definitely buy!