This is misinformation. The OP has Behringer 8" monitors, I am assuming the 265Watt biamped B2031. The behringers reverse engineered the best monitors of the time (20 years ago) and sold them for $200/ea. The price hasn't gone up so they are even a better value.
Behringer makes some junk, most of the stuff is in the middle, some of the stuff transcends the price/performance ratio. Truth monitors fall in the last category. Almost all of their stuff is reverse engineered high quality gear sold at volume with a low profit margin.
The reason I am bringing this up AGAIN is that the OP will have a hard time improving upon the 8" B2031 for purposes of playing back guitar modelers that he can also use for mixing. Anything with a smaller cone or lower wattage will lack the same bass and punch. Sure he can spend 5x as much for something with arguably more accuracy for mixing, but if he hasn't treated the room he's throwing money away. A more accurate monitor is not going to translate into more enjoyment for guitar playback, unless it has the same or more headroom.
The B2031s may actually be loud enough to gig with, but they aren't built for that. If he need something road worthy maybe the Headrush 8s.
I am not saying your advice is always wrong, but in this case it could cause the OP to waste money.