It may come down to personal preference, The 800F's have been reviewed on this site very favorably. Depending on where you live, you should have no problem finding a Paradigm dealer, their network is pretty extensive.
Here is the review on Audioholics Youtube Channel
There is about a $400 difference in MSRP in favor of the Paradigms. Combine that with the fact you can negotiate pricing below MSRP on the Paradigms and have a nice bit left over to put towards a center channel or subwoofer.
I don't think you would be unhappy with either, it is more up to personal preference. My only experience with SVS is owning a pair of Prime Wireless speakers. They didn't work out for me because of the lack of a remote, but the sound quality and customer support I received when I had questions on the app was very good.