Hi Nick,
Between the two, I'd lean towards the Outlaw. The 8 ohm power rating appears fairly close (100W/ch vs 85w/ch), but the RR2150 is solidly rated down to a 4 ohm load (160w/ch x2, 0.03% THD) while the SR10 lacks a 4 ohm power rating. The RR2150 also features bass management with adjustable high pass / low pass filters, which is helpful for subwoofer integration.
Also if budget is a concern, might not be a bad idea to consider a surround receiver. You can find last years model at a significant discount, and obviously there are benefits to going this routes (more features, expandable to 5 or 7.1, etc).