I agree with BSA'a statement.
We should make sure your sub needs to be replaced (I suspect it does). What is it?
Those AA speakers compete with $500 speakers (I preferred them over Andrew Jones latest Elac UB-5).
Two good speakers (with sub, since you will not get solid bass in your price range) will sound much better than 5 marginal speakers (with sub).
If you are all about home theater and must have the surround sound, either skip the center or see if you can get another AA for your center and save money on your surrounds.
At $80, these (as noticed by AfterLife) look like a good budget value for surrounds:
https://jet.com/product/detail/e47ccd8f1826490c8be1541ee3d08e00?jcmp=pla:ggl:gen_electronics_a1:audio_audio_components_speakers_a1_other:na:PLA_348772140_24231300420_pla-156819079020:na:na:na:2&code=PLA15&ds_c=gen_electronics_a1&ds_cid=&ds_ag=audio_audio_components_speakers_a1_other&product_id=e47ccd8f1826490c8be1541ee3d08e00&product_partition_id=156819079020&gclid=CNaG6dPph9ACFYwvgQod0HINMg&gclsrc=aw.ds
The bottom line is not much content is in the surround channels and it is usually effects stuff. You will not recognize that the shattered glass falling all around you sounds like 10mm thick glass instead of the 15mm glass it should be. Or the bullet whizzing by sounds like a 22 instead of a 9mm. Even something like a chopper flying in from behind, your sub is catching the heavy stuff and the surrounds are playing the higher frequency whirring, etc. We just don't know (or care about) the subtleties of these sounds enough to spend too much of your budget on them. However, you will notice that the voice and the acoustic guitar of the musician in front of you seems bloated at certain frequencies and lean at others.
Just to be clear, I have not heard the Fluance Bipolar speakers, and my expectation is that they would not sound especially good for critical listening to music. However, for surrounds, they have a lot of stuff (on paper) going for them, and I expect they would be a good choice and allow you to put more money where it matters.
If you have money left over, adding a second SUB-1200 to smooth out the bass effects in your room is where I would put it.