I'm not a fan of the Edelbrock system since it is a "black box" which can't really be tuned. FAST used to make good stuff but they have fallen behind now. I would never recommend FiTech even though some people have good luck with those systems. Same with MegaSquirt, I'd never use a MS system or recommend it but there are a lot of MS fans out there who will talk about how great their system is for hours on end. Only thing I recommend these days is a Holley system. The Sniper is the entry level throttle body, next step up is the Terminator X so probably one of those systems. The HP and Dominator systems are much more expensive and complicated and really need a pro to install.

My sniper 4500 has been pretty good. It learns well, it runs well I did wire it per the manual, and I did upgrade my alternator big time.
I would also prefer the ECU was separate.

If you are going to choose a Holley system, I would suggest an original terminator kit if they are still available. They are a nice throttle body system with an HP computer. I don’t like the chinsy connectors of the terminatorX, or the fact that it is sensitive to environment like moisture/ temperature. It also is limited in the use of “wet” fuels because of the bosch only wideband. No on board data logging also means toting a laptop around if you want to get it zeroed in.
If you are making the switch to efi, it is cheaper to spend the ching on the heart of the system and be unlimited on upgrades down the road. An HP will get you a better harness, better sealed ecu, ability to run COP if you choose to, has on board data logging, and uses the exact same software as the flagship Dominator ecu. The HP is limited by only having a few extra configurable in/outputs. However, they do make an expansion module for it from what I hear.
Or just go full bore and get a Dominator system and log/ control anything you can imagine.

If you want port injection then you have to step up to the Holley HP or Dominator ECU. There is a big price jump when you do that. If you need some help with an EFI decision contact Rich at FAST Man EFI. Rich is a member on here but he doesn't check in on a daily basis. Rich is a dealer for different EFI vendors and he has installed hundreds of systems over the years. He tunes a couple hundred EFI cars a year so he has seen most everything.

For a street car I wouldn't worry about port injection vs. throttle body. For a race car the port injection can be helpful. For a big power race car, especially something boosted then you should go port injection with either a HP or Dominator ECU. Anything in the four figure power level probably wants to consider getting rid of the distributor and using coil packs. Of course, I ignore all those rules when I did the EFI system for my street driven Duster!