Best plan here would be to go with an Outlaw Audio ICBM. It's a fully analog 6 channel x-over, very well spoken of from all I've heard. Only about $250 + shipping, so I don't think a person could go wrong.
MOST SACD/DVD-A players do bass management wrong if they do it at all. I suppose this is changing, but even buying a very expensive unit won't guarentee they do it right.