There is no such thing as a medium/long range gun. All AEG's should be capable of flinging a BB to the maximum range provided the fps is right. Barrel length and cylinder volume is irrelevant. You have 1.13 joules of energy regardless, So all bb's that exit the barrel have the same energy and the same distance potential.
@Rogerborg is absolutely correct when he says the raider can perform. Because any gun can. If you want a new gun cool, But personally I'd tweak the existing one first.
The trick is consistency, and accuracy. Neither are variables that can be pinned on one component, rather they come with a combination of the gun as a whole.
To get consistency, you need a gearbox without leaks, and a barrel that is correct for the cylinder volume. The hop unit, bucking and airseal nozzle also need to be as good a match as possible.
To get accuracy you need a well finished, straight barrel, that is running a consistent hop unit with a decent bucking. Barrel length - irrelevant, Cnc hop units - irrelevant.
With that in mind any aeg can be made to meet your criteria. The truth of the matter is to get those things that are important you have to build it yourself. There is no out of the box perfect solution. A bog standard JG with a little spent on it can out perform guns that cost far far more, and there is nothing more satisfying.
For any M4 platform - Upgrade the hop unit to a rotary style, Put in a half decent inner barrel like a zci 6.02. Stick in a decent bucking maple leaf, laylax ect. Then sort the airseal nozzle, and gearbox airseals (piston head, cylinder head). Total spent less than £50. Do it right and you will have a gun that hits maximum range and does it reliably on target.
Rate of fire is as easy as a motor change. A 35K rpm motor on a good 7.4v lipo will produce 25ish rps. Anything more than that you have to start messing with the gearbox.
Picking up a specific brand gun, or expecting one out of the box solution to be better than another is like splitting hairs. You might get a great gun, or you might get one that has one minor fault not picked up on in QC that means it can't perform. Either way if you are buying a gun solely for how it performs out of the box, then you will never get what you want without spending silly money.
Personally you couldn't give me a gun with an ETU. The wildhog and the Ares both have trigger systems that are prone to failure. And when they fail they cost a small fortune to replace (because no one is going to repair an ETU). Basic contacts in comparison will take any battery without complaint, and with a protection mosfet they should last for many many years.
If you can't tech, then learn to do it. For £45 you can buy a complete gearbox from AK2M4. Use it like a practice tool. Shim it, strip it, rewire it, Correct the airseals. Then once you are confident make the Raider into a monster.
https://www.ak2m4.co.uk/internal-parts/gearboxes-complete/ec-complete-gearbox-qd-v2-rear
Rotary hop unit
https://www.ak2m4.co.uk/internal-parts/hopups-rubbers/zci-prowin-style-hopup-chamber-plastic-m4
Good bucking.
https://www.ak2m4.co.uk/internal-parts/hopups-rubbers/maple-leaf-macaron-50-aeg
Nub for bucking.
https://www.ak2m4.co.uk/internal-parts/hopups-rubbers/maple-leaf-nub
ZCI inner barrels.
https://www.ak2m4.co.uk/internal-parts/inner-barrels
Air nozzle.
https://www.ak2m4.co.uk/internal-parts/air-nozzles/ra-m4-aluminium-nozzle
