Dual compatible players sound good but I wouldn't get one. For starters apparently the player mentioned costs more in the US than buying a BR and HD-DVD player together. Secondly as devil said one technology is sure to fail, and even if you have a dual player what happens if you get a single player for the bedroom (and dual players cease to exist), or if your dual compatible player breaks? Lots of useless disks in one format basically.
Personally I would do what Devil said and not touch either tech until one of them dies. BR looks like where I would put my money, but why gamble? By the time it is over (probably about a year to 2 years) prices will be dirt cheap and the tech will have got better (look at BR players and how the 1st gen can't use some of the capabilities of the 2nd gen disks). Even now you can get a HD-DVD player in the US for about £125GBP. Which means that we and the UK should be seeing prices under £400 by 2010!
Although I reckon overall BR or HD-DVD may both have a limited life. Whichever wins IMHO will only reign for a few years. Basically online content is growing every day. Even now the BBC and ITV are bringing channels online, with Microsoft, Apple, and the big US networks looking to get in on the action. It's pretty rubbish at the minute, but give it another couple of years, and if Cytanet release their stranglehold and bring us into the 21st century for bandwidth (I say if, but surely when as 3rd world countries will soon be laughing at us at this rate...) and even we could be benefitting. Even now I have ripped a lot of my DVDs to media streamers to use on my TVs (Tvix and Buffalo units). Brilliant stuff and getting better all the time. Why have annoying physical media?
Oh, and a rather basic early attempt at online TV just came out with Joost (same people who made Skype). It's free but in beta at the minute and you can only try it if you are invited by a beta user. I have a few invites left, so if anyone wants one feel free to post your email here and I'll set it up.
Cheers