I've got some money...what mod is next on 03 cobra

Mid-pipe, CAI and DR's easy for under a grand with a little left over.

Might want to consider subframe connectors.

Go with a UPR O/R X-pipe $150 + MIL Eliminators
JLT CAI $200 http://www.svtperformance.com/forums/showthread.php?s=&threadid=91965
Nitto DR's $385 shipped from discount tire
Subframe connectors $70 - $200

Your pretty much at your mod list end then without voiding the warranty .

Throttle body provides very minimal gains on a stock pullied Cobra.

Any of these items would be a logical next step.

CAI
Mid-Pipe (Be careful.. O/R mid-pipe may be frowned upon by Ford)
SFC's
DR's
Performance Tune (Predator/SCT)

U.M.

I would have to say go with the K&N FIPK, or some form of aftermarket cold air kit. I mated My FIPK with a JLT Ram Air and it works great. Predator is a good mod also, it allows you to choose from the canned tunes and also to import "custom" tunes. If you have to take it back to the dealership for work, you can always re-install your factory tune. one word of advise on the Predator, make sure you buy it from someone that will support you with *FREE* tunes, like Amazon Racing, Runnin' With the Devil, or SoCal Diablo. I thought I was being smart and saving money by paying $350 for my Predator on Ebay, when in fact I then had to pay an additional $100 to get a custom tune because I did not purchase the unit from a tuning vendor. Now that I have paid the $100, I have unlimited tunes via James at RWTD, and he is a great guy. Drag radials are another really good mod to hook up better on the street or track. Mine were purchased at Discount tire direct, they have free shipping. You can get a mid-pipe, but like Uncle Meat said, stay away from the O/R ones, even though I love mine . If you do your homework, you can probably get all of these for close to 1 grand.

-Mike

Go with dr gas x pipe, think you can get them with cats now. Diablo predator is good, you can reset everything to stock when you take it in for service, and drag radials. Get a smaller blower pulley for more boost.

I would do the following mods if I were in your situation and wanted to "keep" a warranty.

First a good CAI, followed by subframes, followed by a clutch quadrant and firewall adjuster... after that maybe a nice catted h or x pipe.

Not a HP thing, but replacing the stock shifter really made me enjoy driving the car a lot more.