I have the DC and I like it. However this is a topic of great debate. Some say it is worth while and others that don't have them, knock them for this or that. The DC setup will stay as cool as the stock tubing, but it is a much less restrictive path for the air to flow through.
BTW, put your silencer back on! There have been dyno results that show a gain in HP with the hood open, but once you close the hood, the hole where the silencer goes now sucks in tons of hot air. Enough that it loses about 3rwhp on the dyno.
Also keep in mind that while the DC setup may not yield great gains by itself, it will add to the whole package down the road.
88 LX 5.0 Vert