Hi All

Looking for some suggestions

I currently have my HTPC wired to a Thompson B0440 wireless router/modem and my XBOX running over Wifi at the other end of the house.
However, the thompson doesn't hold a stable enough wireless connection with frequent dropouts and connection failures, plus doesn't have the throughput to stream HD reliable. XBOX says I have full strength signal, so i doubt it's a range issue.
Now I have a dual band N wireless adaptor on the XBOX already. What I would like is a gaming type wireless router/modem combo. The reason I ask for a gaming one is the HTPC is continually on and my wife might be surfing the net or playing something on Steam or something else on the HTPC or laptop (also connected via Wifi). I can tell when this is happening if I'm playing on Live beacause I get about 1-1.5secs delay on everything
So what I want is;

Router/ADSL2+modem combo

Dual band (5 & 2.4ghz) N spec (so I can set xbox to 5ghz, laptop to 2.4)

Some type of QoS improvements/data recognition for gaming

RELIABLE!

The D-Link DGL-4500 is the sort of thing I was looking at but it is only a router - no modem

Any suggestions?