believe it came out slightly later than the rx65, been on the market roughly 6 months id say.
check out speedzones they do a thorough comparisons between radars every year.
www.speedzones.com/longrange.html
theyve also got a review on the new STi detector seems good words about it so far, and it seems invisible to all RDD's which might be crucial considering they might change the law in regards to detectors, so might be worth holding up on your purchase just yet
http://www.speedzones.com/smlTests.html