I'm jealous of the splash the Philadelphia Eagles has made this season, too, but we're not exactly in that phase where we've got a solid foundation of a team and are just 1-2 elite players away. We're still trying to build our foundation, and there are a lot of different ways to do that.
There's some strange conclusion-jumping going on right now, from a laundry list of things going wrong like the fact that we "screwed up the Orton trade", the fact that we "have no salary cap room", and the fact that "we have no defensive line".
First, our defensive line right now looks like it is Ayers, Vick, McBean, and Dumervil. This is arguably our best DL in three years, already, plus we have a better scheme, better defensive coaching, and a couple of good run-stuffing MLB's that should do better at protecting the middle than we could last season. Second, it's been established that the Miami trade talks weren't. As in, they never happened. All that happened was that Orton and Miami tried negotiating a contract, and they couldn't. It didn't even get to the point of Miami and Denver determining compensation. There was no trade there to screw up. Denver didn't bluff too high or anything, it just didn't happen. Third, the theory of Denver having no salary cap room is something like two weeks old and has already been debunked.
I think that what is possible here is that we're seeing the difference between Xanders alone, and McD + Xanders. Xanders is a value shopper. He brought in Vick, for instance. McD was the splashy shopper.
We're very definitely in the "splashy shopping" portion of the free agent market, and in the meantime, we're getting rapid indications that we hit several home runs on this year's draft - something Xanders was also instrumental in. It appears he found really good value - there's that word again - in Mohammed, our two TE's, and of course the players that were more highly drafted than them.
So, relax for now. There are plenty of DT names out there, none of them are superstars, and there's a high likelihood that all of them are currently overvalued. Here is where the passing of time works in our favor.