[kefar] “So if I shoot a wedding or long event I’ll have to make a tape change in the middle. I’d really prefer the Panasonic but I’d hate to run out of tape in the middle of a ceremony…does that make sense?”
Using a FireStore (or similar) FireWire HD (“tapeless aquisition”) record unit would allow you to record up to the limits of the drive in the unit you chose to purchase.
https://www.focusinfo.com/products/firestore/fs-4.htm
Or, there’s always the technique of connecting a second camcorder via FW to the FW output of the first camcorder.
At approx. the 1-hour mark, you’d just put the second camcorder into the record mode and it would continue on the second tape for another hour.
This method will work with ANY FW camcorder, even an inexpensive “home video” 1-CCD type.
Since all you are using the second camera for is its “tape deck” section, the CCD quality does not come into play… the quality of the DV tape recording it makes will be identical (image-wise) to your main camcorder.
I have bought many of these “back-up” DV camcorders, used, for around $175 each (Pawn shops, eBay).
There’s also the use of 80 minute DV tapes.
I have used these “thinner” tapes many times and had no problems, but there is always the risk of having a failure due to the more fragile nature of a thinner tape.
On the IMAGE side, the PD250 (basically a PD150 which only records on the large-size DV tapes) will have a much better image in low-light situations than the Panny. If you shoot in “natural light” for many events, this might be a serious consideration.