AVS Forum Special Member
Join Date: Feb 2016
Location: Danbury, CT, USA
Mentioned: 37 Post(s)
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Your link gives a 404 at Amazon.
Fortunately, none of the systems you describe is a HTiB (home theater in a box) system. Those are packages that come from a single manufacturer. They may use nonstandard components (like 3 ohm speakers) and passive subwoofers.
1000 sqft is a large space. Whether the speakers would produce enough sound would depend on the listening distance. If you use the whole space, it may be a challenge. You may have to consider speakers like those from Power Sound Audio, which have high sensitivity and can be played loud. (They aren't pretty, though.)
The subwoofer may be a larger challenge. I doubt that a single SB2000 would be enough for that space. A pair of them may not be enough. That's where things can get very expensive. The most popular medium-range brands here are mostly Internet Direct: Hsu Research, Monoprice (Monolith series), Rythmik, etc. It'd be easy enough to drop a few k on just a pair of subs. (And these are not boutique brands.)
The second system that you list uses KLH speakers. That's an old name that has only recently returned to the market, under new ownership. I haven't read reviews of them. The Marantz SR7012 receiver is a good AVR. It's a 2017 model, so it's available at a closeout price (if you bought it separately) of less than half its list.
The AVR is where "future proofing" comes in. 40 year old speakers would be perfectly usable, if they weren't worn out or damaged. Newer AVRs have 4k passthrough, Dolby Vision support (like the LG OLED), Atmos, DTS:X, etc.
I'm not competent to specify a system for that space. Perhaps someone who is will chime in. I hope that 3.5k is enough for the class of system that you seek.