Underwater Housing?

[DigitalBoy]

I own a 40D. What would be a good underwater housing? Is there anything to look for when purchasing one?

Thanks

[cicopo]

Is this for diving? If so the cheapest models from a reputable company are by Ikelite, but you need both a housing & a port so be careful working out the total cost. There are special forums for underwater photography at Scubaboard & at Wetpixel, plus links to several other manufacturers of housings.
www.ikelite.com
www.wetpixel.com
www.scubaboard.com