My Acer has a dynamic contrast ratio which I have switched on, so that's probably helping me, but the only dark game I've played is Q4, and I didn't have a problem with it's performance, as I said, overall it looked better than on my CRT, and that was despite it only being at 1600x1200 rather than 1920.
The manner in which you describe the backlight bleed leads me to believe that it was appalling, so I can appreciate you not enjoying it, however, the backlight bleed on my Acer is even over the screen**, so certain sections of the monitor do not look washed out.
**every PC LCD I've seen has backlight bleed to some degree....that said, the latest Samsung LCD HDTV's look midnight black, I was very impressed by it..
I have used that dynamic contrast feature on a Samsung 226BW and found it very annoying to see the backlight switch between light and dark all the time. It looked rediculous.
As for backlight bleed the BenQ I tried also had an evenly uniform backlight with no light halos anywhere like so many other LCD's have. But that didn't really matter because the entire backlight was a uniform grey not a uniform black. So yes dark things still looked washed out. it isn't necessarily bleed which causes that effect, its the brightness of the backlight itself. Bleed just makes it worse.
My dad also bought a brand new 40" Samsung LCD HDTV last month and at first I thought the same as you about the blacks.. But that obviously had something to do with the lights in the store because once we took it home the blacks didn't look anywere near as good. It is better than an LCD monitor but the problem is still there.