Hey Floy.
As you may know, they are essentially the same camera. The PD150 is the DVCAM version of the VX2000, plus some better audio input and controls.
DVCAM is a prorieatary Sony format based on the regular DV specification. It is considered a professional format. You can learn about it in depth at
Adam Wilt's DV FAQ. An overview of the salient points:
-DVCAM has a wider track pitch than DV, so it has 50% less dropout (according to Sony- I don't know anyone who's ever complained about dropout with regular DV).
-The tapes themselves are more robust.
-DVCAM uses "locked audio," which allows for frame-accurate audio synch when editing deck-to-deck. This is not an issue if editing digitally.
-DVCAM adds setup, which means it's black levels are compatible with with NTSC (North America's) standards. Regular DV uses the Japanese standard for black level, so it is not legal for broadcast in the US. Regular DV has to be adjusted for television broadcast, so you have brightness problems.
DVCAM really is a profesional format- Sony has discontinued it's Beta SP line and has replaced it with DVCAM. The PD150 is very popular in the industry. So popular, in fact, that Sony artificially engineered a shortage of the PD150 because it was taking away sales from their higher-end cameras.
The disadvantage of DVCAM is that the mini-size tapes (what the PD150 uses) cost twice as much as regular DV tapes and have a maximum recording time of 40 minutes.
If you intend to broadcast on TV or want to hire yourself out as a professional camera person, then go with the PD150.
For what it's worth, when I had to make this decision, I chose DVCAM and I am happy with the choice.
As for lavaliers: Sorry, I don't have any advice for you, except go with UHF, since this is New York City, after all.