Hey Felix,
I am going to give you my complete honest answer. First I'd like to say I plan on purchasing the Iris F-15E. No one can deny that thing looks amazing. Now if weapons and systems are your thing, look no further than the Milviz F-15E. How does guided air to air and air to ground munitions sound to you? And I'm not just talking put the plane in the HUD and fire. Our bird can do BVR air to air combat. We have simulated all the radar modes to the T. Got the coordinates of that pesky bridge? Set it as a waypoint or input the data into the UFC, drop a GBU-12/GBU-38, whatever you want...bridge no more. Feel like firing an AGM-65? Just slew the seeker in the HUD to your desired target, lock, and fire away. Running low on fuel? Call up the tanker, (which actually pops up and has a functional boom), get your gas, and go kill more targets! Now not to stir anything up, but as I've said, if it's the systems you're into, look no further than Milviz. And don't get me wrong, ours is not lacking in the eye-candy category either. I think you will also find our sounds to be incredible. I nearly jumped out of my seat after hearing the new sounds on my first takeoff with the SP. With regards to track-ir and ez-dock, you're in luck. They both work great!
Speaking of SP's, don't let the past few weeks diminish your thoughts on future SP's. We are currently finishing final testing (one of our coders is sick), and once everything is good, we'll have a new installer ready for you. And don't forget the 30 day money back guarantee.
I really feel like I have ranted enough, if anything, just give ours a chance, you can always get your money back if you're not happy with it.
If you wish to talk nitty gritty details, PM me and I'll shoot you my cell phone number, that way we can have a more detailed conversation.
All the best, Diego
edit: I almost forgot, we had a real USAF F-15E IP test our bird out, he had nothing but good things to say, and we took all his critiques to mind in our SP.
edit2: having now owned both aircraft, I think it's safe to say you should get both! Each has it's strong points, and I see myself flying both regularly. Seeing as how you have and enjoy the T-38A, I know you'll be happy with the Milviz F-15E