" Xbo360 Premium + HDDVD adapter =$600 US
PS3 Premium (that is a more powerful machine, with built in HDdvd and bluray) = $600 US"
Well the thing is... the HD-DVD is not required by the Xbox, while it is for the PS3. It's not like BluRay or HD-DVD movies have exactly caught on yet, so what's the point? Anyone who is buying a PS3 is essentially paying an extra $200 for a drive they will likely never use. Sure, the games use it... but it doesn't matter to people whether it's on a DVD or BR or HD-DVD, really.
The drives prove to be an even bigger waste for those people who don't have a high-definition TV. I'd assume that is someone purchases a $600 console, they probably have one, but people are not exactly jumping up in the air at the chance to buy a new $2K TV.
As for a more powerful system, it's not necessarily. They both have their pluses and even out the same. I am not on either side... I plan on getting both consoles eventually, but the fact is that both systems have equal power and it's up to the software to take over now.
There was an interview the other day, although I can't recall where, from a game developer who was comparing both leading consoles. He mentioned that you would have to be an idiot to code a game for the PS3 and not the Xbox, because the PS3 is a huge pain in the ass. Sony does not write good game dev SDK's, so it's a true chore for companies who want to code specifically for that system.
That's one reason I think more game companies will slide over to the Xbox's side of the fence. Microsoft knows how to write great development software... just take a look at their Visual Studio... it's amazing.
Anyways, I am not one to jump to conclusions, but I think in the Xbox/PS3 battle, the Xbox will come out on top. PS3 will have to deliver some amazing exclusive software to have people shell out the $600, or round up enough idiots (like me) who will buy the system irregardless.