Does anyone have any experience, preferences, likes and/or dislikes with any of these AMC EFI systems?

Affordable Fuel Injection:
http://www.affordable-fuel-injection.com/index.php?id=22&title=AMC%2FJeep+Throttle+Body+Fuel+Injection

Edelbrock Fuel Injection:
http://www.edelbrock.com/automotive_new/mc/efi/pf_amc.shtml

F.A.S.T. EZ EFI:
http://www.fuelairspark.com/WhatsNew/Files/fastez-efiselftuningfuelinjectionsystemwith4150throttlebody.pdf

Howell Fuel Injection:
http://www.howellefi.com/shop/customer/product.php?productid=16219&cat=252&page=1

Mass-Flo Fuel Injection:
http://www.mass-floefi.com/mass-flo.html

Professional Products EFI System:
http://www.professional-products.com/efiSystems.html

Retrotek EFI:
http://www.retrotekspeed.com/products/bossefi/bossefi-system/bossefi-single-quad.html

Here's the vehicle I have:
1974 AMX, loaded
Non-emissions 360 w/Ram Air Systems Cold Air & Trendsetters
727 Torque Command
Stock Gearing (either 3.15 or 3.54, not sure)

Additional Mods I Will Be Making:
Sig Erson TQ20 cam
Aftermarket aluminum intake manifold (included with Edelbrock)
Aftermarket distributor (included with Edelbrock). I already have a Proform HEI conversion distributor (brand new, never installed)
Eventually, a stroker crank with 9.5:1 pistons, mild porting/polishing to heads w/valve job, balance & blueprint to AMC specs and a mechanical 700R4.

Here's How The Car Will Be used:
Fun
Long trips to high altitude areas
City/highway driving
No serious racing

Goals:
Reliable starts
Better mileage
Better throttle response (regardless of altitude)
More Power
Good after purchase tech support
Access to replacement parts
Minimization of headaches

I have a Windows XP laptop and a chassis dyno tuner nearby (unless the recommended system does not need tuning or can be done with an included stand alone computer).