I guess the problem is I don't know exactly what I'm looking for either. I don't know a lot about optics, but I know that I have to have ones made more specifically for the scout because of how far the rail is to the front. Or at least that's my understanding.
I want to use it for the purpose it was built, to use a lower powered scope and both eyes open. I'm totally unfamiliar with the setup since it's so far forward.
You need to look for "scout" or "pistol" scopes with long eye relief. I think Leupold makes a few "scout" style scopes. There are some guys at m14forum.com that run that type of setup. I think most will tell you 1000 yards with a scout is pretty high hopes.
if you want to keep your factory scope mount, your best bet is an Aimpoint. a friend of mine had an EOTech mounted on his but it sits very high. he sold the EOTech and put an aimpoint on it.
long eye relief scopes have a very small eye box to look through. i've used them (both leupolds) and was not happy with them. i found it incredibly difficult to use the scope while shooting from any position other than from a bench (even prone was a challenge).
if it were my rifle, i'd ditch the forward mount and get a replacement handguard and get a smith scope mount and run a low power variable power scope on it (like a 2.5-8x or 3-9x).
it would be a very versatile setup and much more forgiving than an extended eye relief scope.
I have a Leupold FX-2 scout scope on a Marlin 45-70 that works perfectly in it's role as a brush gun. The mag is fixed at 2.5 and is perfect for quick acquisition with no decrease in FOV. You won't be doing any long distance work with this configuration.
I have an m1a scout with 2 optics on qd mounts. Primary optic is an aimpoint t1 on the low larue mount. Secondary is a burris pistol scope, 2-7x in low warne rings. The burris is not great glass but it's functional. I've gotten out to 800 yards with this combo, not far after that the round goes subsonic.
My friend with the SOCOM uses the Burris 2-7X pistol scope. It works great and the extended eyerelief is just right for the full magnification range.
One of the interesting thing is with the pistol scope mounted so forward, it is actually very easy to co-witness. Shooting with both eyes open is a cinch.
I have a 2, one on a .308 Steyr Scout, and one on a SIG 556 set up as a scout.
Fast, quick, both eyes open optic for CQB.
On a good rifle you can see well enough to shoot MOA groups at 100 yds.
Good for large game/man sized targets out to 400 yds., maybe 500 tops.
Not a long range precision optic.
My Steyr with a rear mounted 10+ power scope would be an awesome and accurate light weight medium range rifle out to 7-800 yds., but thats not really what a Scout was designed for.
I would start with a receiver scope mount if you need to reach out that far. Something like this should work well for you: M1A/M14 scope mount
With this scope mount you will have more options when choosing glass because you are not as restricted with eye relief.
In addition to the Burris and the Leupold Scout scopes already mentioned, Weaver makes a very economical fixed 4X28 Scout scope with a 9.0 eye relief for the forward mounting option.
In order to mount a scope on a Scout, you have to get a "pistol" scope with the long eye relief. Leupold makes a few. 1000yds is a long range for that rifle. If you want to make this a 1000yd rifle, purchase a mount for the receiver and attach a scope. I have Socom and I've mounted an EOtech on mine to take advantage of the mount. A good site for info on M1A's/M14's: