Recommended accessories (regardless of camera choice):

1. At least an 8GB SDHC card, preferably 2 since it has 2 slots. The bigger the card the more video you can capture at once. Prices for these are dropping all the time, and usually 2 8GB cards are cheaper than one 16GB card. You can buy one of the cards with a USB card reader for about $2 more. Very useful and doesn't require you to plug in the camera directly.

2. An HDMI to mini HDMI cord. These camcorders don't come with the HDMI cable so you may as well buy it right away if you have an HDTV. It does come with all other cables for regular TV hookup.

3. Extra or bigger battery if you wish to film for long periods. The battery must be charged on the camera unless you buy an external charger. The battery than comes with it holds about an hour of charge, the next size up holds about 3 1/2 hrs, and the largest holds about 4 1/2 hrs. The drawback in that these batteries are MUCH bigger than the one shipped with the camera, so it will stick out the back of the camera noticably. I would suggest getting the middle size as the extra hour on the bigger one isn't really worth the price.

4. A fun bonus, but not required is a wide angle lens if you want to get the entire room in a shot without moving around. This would be helpful especially if you could set the camera on a solid surface to prevent shaking, and still capture the whole room's activities. The included remote would be most beneficial in this situation.

SUMMARY

In the end, we are keeping the Canon HF200 and returning the JVC Everio HM 200. This is almost entirely based on the difference between indoor video quality.

Which one should you get?

Consider:

 Price: the JVC is $100-$140 cheaper than the Canon (do your own Amazon/online retailer verification as prices always change)
Outdoor video: About the same on each one
Zoom: longer optical on the JVC, longer digital zoom on the Canon (a very good digital zoom though)
Stabilization: Optical on the Canon, which is quite superior to the JVC digital method
Indoor video: far superior on the Canon
Accessories: extra batteries, lenses, charges and the like seem to be a bit cheaper for the JVC, but they're all expensive in the end
Memory cards: they both use SDHC, but the JVC has two slots which is very handy and cheaper than buying one larger card
Hand strap: better design on the JVC
Size: nearly the same, Canon just a bit wider
Audio: Generally the same Dolby 2.1, although the Canon has volume controls that are better. It seemed to pick up a bit more.
Still shots: better on the Canon, but not super great either way
Software: never used either one, other reviews say they're both bad. Get a mac. Use imovie 09, it's wonderful!

In the end if you're filming inside, get the Canon. If you're filming outside get the JVC. If you have trouble with hands shaking, get the Canon. If you need to spend as little as possible get the JVC. If it MUST fit in your pocket get the JVC, if you are ok with a bit bigger get the Canon (it does fit in a jacket pocket, but I don't wear jackets in the summer).

5 stars for the JVC outside, 3 stars for inside
5 stars for the Canon outside and 5 stars for inside
5 stars for JVC menu, 4 stars for Canon menu
5 stars for JVC strap, 3 stars for Canon strap

If you want further reviews or to purchase any of the camcorders mentioned here, these are the direct links to the products at Amazon.com

JVC Everio GZ-HM200 Dual SD High-Def Camcorder (Black)

Canon VIXIA HF200 HD Flash Memory Camcorder with 15x Optical Zoom

Canon VIXIA HFS100 HD Flash Memory Camcorder with 10x Optical Zoom

Crumpler 5 Million Dollar Home Photography Messenger Bag - I love this bag! You could also consider the Crumpler 6 Million Dollar Home if you have a lot more gear.

Transcend 8 GB SDHC Class 6 Flash Memory Card with Card Reader TS8GSDHC6-S5W - this is best so you don't have to plug in the cameras to get video onto the computer. Works really slick!