to get the '08 Accord instead? it has more horsepower, and I can't see any meaningful features it doesn't have that would justify the $6,000 price difference.

It depends on what style fits you best. I personally think the Acura is classy/ sophisticated, whereas the Honda is younger/ cheaper. I have an '03 Accord sedan, but I'd rather have a TL. If it was me, I'd get a '08 Accord coupe (not sedan) over the TL. However, I'd get the TL over the Accord sedan. I haven't seen the new TL design, so I'm guessing it's going to look good, but I don't know that for a fact.