What sort of rifle is this going on? An AR-15? ACOGs are pretty expensive, so you should make sure that it's what you really want/need for your intended purpose.
If you're just a range jockey, like me, the rig you are asking about may not be what you need. Having that mini red dot on top of the ACOG is neat in theory, but I hated using it. It was really uncomfortable and I wound up not using it much. I'd imagine that for an "operator" it could be a useful piece of equipment, but unless you NEED it, I'd pass on it. Although I ultimately got rid of my larger ACOG, I did use a TA33 for a little while. It's a 3X with very generous eye relief and I didn't have any problems engaging targets at 25 yards with it employing BAC. Had no need for a red dot with that scope. It's also relatively small.
After having tried out a bunch of different scopes, I settled on a 1.5X ACOG. I got the TA44S. It's tiny, has VERY forgiving eye relief and has the benefit of a bit of magnification. I love it. In fact, I sold all of my red dot after having gotten it.
Just keep in mind that when you buy an ACOG, you are NOT paying for optical quality. Although the glass is certainly a step or two above "run of the mill," what you are paying for is a bullet proof package with a unique reticle system with a unique illumination system. As I said, the ACOGs are tough and this can be attested to by lots of guys that have gone to war with them, but for me; if I'm going to shell out over $1K for a scope, I'm looking for optical quality.
If you aren't a law enforcement officer or soldier, and are looking to drop a little chunk of change, I'd be looking at the 1-4X Nightforce. It has superior optics and it's also built well, although probably not as well as an ACOG. I went Nightforce and haven't looked back.
If your heart is set on an ACOG, I'd get something with a little less magnification and stick with the 3Xs and under. I just think that 4X is a bit much for up close and it isn't quite enough for long range precision. Also pay attention to the eye relief. I'm not talking about reading the specs on the website. I'm talking, go to a shop that carries them and look through them. Trijicon publishes specs for their scopes based on design specifications and not what things actually are in use. Believe me, if you go by the specs alone, you may not get what you want.
If you can't look at them, order from a place that takes returns. I'd also scour the web for reviews and pay particular attention to comments regarding eye relief.