- It's better to have one SERIOUS sub, then extend to two.
- "Serious" to me means at least 12" and 400W+ (though if you don't play too loud, there are less expensive ones that can fill in the bass, even some Klipsch, Monoprice...)
- Two subs will be a mess UNLESS your receiver can accommodate that, like Audyssey Sub EQ HT or ARC or whatever flavor of Dirac...or you do a lot of measurement and "Sub crawl" yourself.
- Big speaker companies seldom make the best subwoofers. Take it from this loudspeaker engineer, it's a VERY different sub-specialty.
- For the surrounds...the subwoofer does not put out "all the bass" magically. The others still put out some, and definitely midbass --> I much prefer 6" over 5"
- I mostly agree with
@everettT - put the money towards a really good sub, it will enhance the experience.. But don't skip the surrounds, get something really inexpensive like
https://www.parts-express.com/Dayton-Audio-B652-6-1-2-2-Way-Bookshelf-Speaker-Pair-300-652?quantity=1 for the time being.