welcome aboard and just search or browse the site and you will find as many opinions as there are choices.
it comes down to what you are looking for.
They all pretty much handle the same as a military AR.
some are identical, some are real close, some are not so close.
do you want one that breaks down exactly like an AR or is that not important?
I have a Colt Umarex M4 Ops and love it. it looks weighs and handles almost exactly like the ones I carried in the Army.
it does not even begin to break down like an issued AR and the internal parts aren't even close. I got such a good deal i don't mind.
I have heard that CMMG makes one that is almost idetical in size, weight AND breakdown but have yet to actually see one.
good luck on your search and hope this has helped. there are soo many options out there you may be here a while reading up on them.