Need an integrated with sub output.

You basically need a preamp output for the subwoofer.

If your subwoofer can also be run off the speaker terminals (such as all REL models); you can use any integrated amplifier. I actually prefer the speaker terminal method for 2 channel music listening, assuming the sub can connect that way.

There are quite a few good integrated amps with pre-outs..

Disclaimer...I am a dealer....The Blue Circle CS Integrated can be custom ordered with pre-outs.

Quite of few nice Creek models have pre-outs. I am sure we can come up with a big list here.
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The best tube piece I've had in a while is the Rogue Cronus...at the price it does everything I need as a one piece solution. Can be upgraded form 55wpc to 90wpc...and it's worth it! Comes w/ sub out (fixed and variable), phono and headphone amp to boot. Very hard to beat.

Enjoy,
David

Outlaw Audio RR2150. Its a receiver with 100 watts per channel. Check the online manual thats on the site.