I asked this question before and got some great ideas, and now I was wondering about specifics. I'm looking for your recommendations!

I don't think replacing the seats are really in the cards. However I did get one of those mesh lumbar supports several of you guys recommended and it's actually been pretty great.

Arm rest? I see a bunch of cheap knock-offs on eBay, but they look very poorly made and the mounting system seems pretty dubious. Options?

Dead pedal? Any specific recommendations?

Cruise control? The same request.

And audio upgrades. I know this is tricky because of the design of the dash, but something with more iPhone integration would be awesome.

Any other drivability upgrades that are worthwhile? Wheels? I have the stock bas 14" steelies.

Power or fuel economy? Injectors? Intake? I don't want to race it. I just want it to be as comfortable and efficient as possible for my daily commute (about 2 hours), especially if I have to keep driving this car until I'm almost 50.

 

For the armrest I recommend the JDM armrest. it replaces the entire center console and its a OEM Honda part. It takes some time to install but it is not at all difficult

Here is a link for the dead pedal 07-08 Honda Fit Driver's Dead Pedal

 

Man, the JDM piece looks nice. Expensive, but nice.
All of the others seem a bit chintzy and don't really match the interior all that well.