Pre-pros with good 2-channel and bass control

I am contemplating my next purchase. I have a two-channel system in which I am perfectly satisfied. I recently purchased a killer sub-woofer I'd like to incorporate into my 2.0 system, but stereo preamps obviously do not get the job done.

Here are my requirements:

A quality stereo stage with sub control enabled.

My amp has an adjustable low-pass filter, so that is not as necessary in terms of function as it is a consideration of build quality.

I'd like the box to be built in the U.S., Canada, some European country, or Japan. (That excludes Parasound P5)

I do NOT care about surround or video processing. I'll find an Anthem d2v if I want to make the jump.

Under $1000 street value.

My current considerations are an Aragon Soundstage and Theta Casablanca I. Thanks.