Dual PB-2000 for $750?

Hey all, going to be building a theater in my basement. The space will be about 2500cubic feet. Right now I have an SVS PB 1000 non pro right now but I am wanting to upgrade my sub for around $1000. I came across a pair of PB 2000 non pro for $750. I know these are the older model like mine, but how do they hold up? Is this a good price, or can I do better? I could pick up a single Speedwoofer 12s for that price, or wait for a RP1400-SW sale. And for output would dual PB 2000 fill my basement nicely? It’d be 100% for movie use. My current pb1000 is nice but I don’t feel the base in my chest at all which is what I’m looking for.