Rock and roll speakers?

Klipsch forte or forte ii Or heresy.

Mapman
Thanks.

R&r, you are welcome.

Easy question, easy answer. The reason is the high efficiency and relative affordability of those. Tekton and zu are other similar options in that regard.

Find two pair of late 70's "Large Advents" and stack them. You can re-cap them, re-wire them, re-terminal them, tweek them, and you will not have spent alot of money.
If going the JBL route, go for the L-150, L-112 or later 4312 series and turn down the controls on the mid and tweet or you will burn your ears off. Others I would consider are the big PSB golds, Vandy 3, Heresy not a bad idea.

Consider a new pair of JBL L890s. They're a bit more than your budget, but they are often heavily discounted. Just keep your eyes open and see. I got my pair for $800 and free shipping.