For people on a budget, this is not geat advice.
The cheapest you're going to find a PRO for is just under $400, which is almost twice as much as the OP was wanting to spend. Save pennies while you can, but move a couple of cheaper optics around while you have to.
Don't get me wrong, I have a PRO on my home defense gun and it's fantastic.
but on my range SBR and my range carbine, I have the vortex SPARC AR. and together the both of them cost me less than a PRO, with enough money left over to buy a few hundred rounds of ammo.
I also have a couple of TRS25 hanging around on some range toys, which are even cheaper - but I wouldn't trust them as far as I could throw them in a SHTF scenario.
I'll be checking out a holosun next, probably, because i've spent too much on guns and I don't want to save up for another PRO.