T-90 Great Camera, BUT...
I wanted an F1N for years.
Finally gave up and bought a T90. It's excellent. Has all the features you could want (spot metering, 4.5 frame per second motor drive, flash synch at 1/250, exposure compensation, etc.) and the added advantage of using the same FD lenses as your AE-1. It's built like a tank, reliable as a cold chisel, and current prices are very reasonable.
Larry
Canon T-90
Pros
First, It's the first Canon camera with TTL flash.
Second, It also Canon's second camera with a Laser Focusing Screen.
Third, 3 Different Metering Patterns, ( push a button & turn a dial ).
Fourth, Because of the digital readout has the ability to adjust either
shutter speed, or aperture in 1/2 stop increments.
A huge advantage over using a conventional dial. Set aperture dial
to " A " to do this.
Fifth, Uses EOS Camera Logic with regards to operation.
Sixth, It runs on 4 AA batteries & is very lightweight body.
Seventh, Plus everything mentioned above.
For a flash system, get a Quantum to get the upgraded module that will
work with the Canon T-90.
Cons
First, Just have someone check the shutter, it can go bad from non-use, like mine.
Second, the Rt strap lug was plastic, something Canon did their best to fix
after the fact. So, watch your systems overall weight.
Third NO separate Flash Exposure Comp Control Dial.
Fourth, No Vertical Grip.
All in all, if you find an operational one, you will really enjoy this camera.