Hi,
Iv just ordered this camcorder, should receive it in the next couple of days. I was also considering the Panasonic SDR-H80 and Sony DCRSX30E. What made me go for the sony DCRSR37ES was that it had a big hard drive but more importantly the picture quality seemed very good. There are test videos on youtube taken with this camcorder in different lighting conditions and all seemed really good compared to my current sony DV camcorder. this is what made my decisioin on this camcorder.

Just type in sony DCR SR37E in the youtube search box.
Hope that helped!!