Soma Rush & IRO Angus both offer higher quality tubing and complete framesets. That 183rd. St. frame looks like it might have a sloping top tube, but I can't tell for sure. It does look decent though. I'd always go for steel over aluminum for the street though. Aluminum may feel good for sprinting or climbing, but it feels like hell on the streets for me. If it were me, I'd go for a Rush. For real cost savings, the Angus can't be beat.