If you can come up with a set of 175mm SRAM arms, I'll trade you my set of 170mm/130bcd Force arms. I could also throw in a DA 7700 crankset (I think 172.5mm/130bcd) w/ BB to sweeten the deal. The Force ones look like this: http://www.racersportif.com/images/parts/cranks/sram_force_cranks.jpg
I have a really beat up set of silver Rival cranks in 175. They still work fine, they're just really ugly. Doesn't seem like it'd be a fair trade on your end, haha!