...blurry photo (sorry!)...Sigma 1606 L, wired, with cadence...have also had a Protege 9.0 wireless (but the head unit crapped out). I like the concept of wireless, and while the 9.0 was working, I had no problems with it, but what I've been reading about things interfering with it, etc., plus the extra expense of wireless, has got me leaning toward staying with wired...the wiring isn't that big an issue for me (you should have seen some of the generator lighting systems I had back in the day...headlight with dimmer switch and a lighted speedometer...I rode a lot at night)...
...spent about 35 bux for the 1606 L at L. L. Bean about three years ago...have seen the wired 1609 L with cadence online for less than that...considering grabbing one for the next computer...