No, you'll experience a HUGE noticeable upgrade, especially if you do any MUSIC listening. The tiny 4" woofers on the SVS Sats can only do so much, and their tweeters can be quite harsh/shrill in my experience. I home demoed the SVS Prime bookshelves a few years ago, sent them back within 48 hours for that reason although the Primes' much larger 6.5" woofers were pretty good for mid-bass slam.
Are you in France? I'd look at Focal and Triangle if they are cheaper over there than here. I'd also look at the Canton Chrono speakers, made in Germany or the Czech Republic. Are you able to order things from Amazon UK? They often have great deals on British speakers: Q Acoustics, KEF Q series, Wharfedale Diamonds, and Monitor Audio.
What % of your usage is movies/TV and what % is stereo music listening?
If it's mainly movies/TV then I'd start by buying the best center speaker you can (preferably a 3 way design), since it's the center that does up to 80% of the HT output and 99% of the dialogue.
Are you in France? I'd look at Focal and Triangle if they are cheaper over there than here. I'd also look at the Canton Chrono speakers, made in Germany or the Czech Republic. Are you able to order things from Amazon UK? They often have great deals on British speakers: Q Acoustics, KEF Q series, Wharfedale Diamonds, and Monitor Audio.
What % of your usage is movies/TV and what % is stereo music listening?
If it's mainly movies/TV then I'd start by buying the best center speaker you can (preferably a 3 way design), since it's the center that does up to 80% of the HT output and 99% of the dialogue.