Hard of Hearing Headphones for TV


My dad hearing is going downhill. He has become unbearable to watch TV around. His complaint about hearing aids are that they make it louder but not clearer. After a ton of research, I've come up with a couple of questions that I need help with:
1-A company TV Ears makes a great claim about transmitting in mono for wireless headsets. They stated that since everyone's hearing loss is not equal side to side that it works best. Any thoughts? I could probably do this with Y cables for any headphones.
2-Sennheiser has some really nice wireless headphones, 410, for TV. Anyone play with these?
3-AKG has a wireless system, 840, that seems very nice but a bit cumbersome.
Who has played with any of these? I'm not afraid of price. I even lent dad my AKG 701's but the cord and size were annoying for him. It looks like I'm going to be spending anywhere from $75 to $300???
Thanks for the help.
elevick
My dad is in the same boat, and I feel your pain. About 5 years ago I connected his TV (audio out) to a receiver and hooked up some small speakers on either side of his chair. With the speakers that close, there is a headphone effect without the annoyance. Your dad will feel more social isolation with headphones if others are watching with him. If he watches alone, this is less of an issue, although he might miss the phone or a knock at the door. By the way, tone controls (on the TV or receiver) or an EQ could be used to tweak the sound to his liking.
My dad uses the TV ears and likes them very much. My mother, who's hearing is much better, appreciates them as well.
Thanks for the input. The stereo route won't work-he'll blast everyone out! He has no sympathy and doesn't feel left out.

Timrhu:
How long do the batteries last on the Stereo Ears?
I picked a pair of Sony MDRRF970RK 900 MHz Analog RF Wireless Headphones for my 98 year old mother and she really likes them. These come with a recharging stand have been working well for 2 years now.
I highly reccomend the Sennheiser 140 wireless phones. They have a compression circuit that will enhance the TV dialog. My mother is 87, wears glasses and finds this Sennheiser model comfortable to wear and TV dialog much easier to understand. Try Amazon.com or J&R Audio. I think this is the best of the lot for your purpose.