That is a lot to tackle, but I have had and SVS sub for about 15 years, many of which were in a dedicated home theater (HT) setup.
I haven't had problems, so haven't utilized SVS customer service, but many have and they seem impressive.
Responses below. Quote rearranged for readability
Originally Posted by mirage1000
Hello SVS users - really need your advise pls.
You input is greatly appreciated.
1) how has your experience been with SVS HT?
I am relocating and sold my entire 7.1 klipsch set up with Denon AVR.
Am ready to design my new system.
My HT system is for 100% movies.
SVS subs are great and certainly one of several industry standards -- especially at the price points they are in.
(see also Emotiva; Seaton, JTR, and many others)
The SVS HT setup I heard at AXPONA 2019 was really amazing. The low cost speakers and electronics sounded amazing.
You don't need expensive to sound great.
2) Do you suggest Prime or Ultra set up?
Depends on: A) budget, B) preferences.
Most people on audio forums will push you to go higher. Because that's what we do.
3) Denon X3000 a good receiver for SVS set up?
This is too vague to be meaningful.
Denon AVRs are great. But you need to figure out what you need and budget.
The Denon 2019 AVRs came out, so you may be able to find a higher end 2018 AVR that is new and fits your needs.
4) For 100% movies - do you suggest a 5.1
2 or 7.1 set up?
I went with 7.1 in 2008, but I would plan for Atmos based even if you won't implement fully now.
5) 1000 sq ft basement with 120" projector and screen set up.
I don't think this is a question, but would be more specific including:
- volume of room ! and H x W x D
- any room openings
- # of seats and setup
- screen 120" diagonal or ??? and what screen gain. Carada was a great brand but now out of business. Chris Seymour at Seymour may be able to help you.
- what projector, throw distance, and 1080p or 4K with HDR
6) Piano black worth extra $$?
This is another depends what you want.
If you want non-glare = no. If you are hiding subs = no.
If you like PB then yes.