Although combo players sounds like a great way to hedge your bets in the remnants of the format war, there are a couple of reasons I personally would not consider one right now. Prior to today's Samsung announcement, all of the available combo players have very expensive. Far more expensive than two separate players combined. Economically, that just didn't make good sense. Now, with this new Samsung, it seems that the price issue may have been overcome, assuming that there are some discounts available through retailers. However, Samsung (as great as they are in their LCD HDTV division) has gained a notorious reputation for buggy firmware in their Blu-ray and combo players. Maybe this new one will change that, but is it worth the risk?
And, as SSC_Nerd said, the writing on the wall is looking more and more like there simply won't be any new HD DVD movies available by the time fall gets here, and anything that is available on HD DVD will likely also be available on Blu-ray by Christmas.
I think the best bet is either the PS3, or the Panasonic DMP-BD30 player. Both are very highly rated, and reasonably affordable (I currently own a PS3, and plan on getting a Panasonic unit for my family room sometime soon). Or, you could wait a couple of months, and there will be many more options, including the newly announced Funai player, which is estimated to have a street price of $275 or less.