I know this thread is probably is too old to revive, as I'm sure Eternal bought his setup, but I am in the exact situation buying 3 B2030P pairs and I discovered that if you use multiple company's "price matching" email or phone services, you can talk them down $10-15 per pair off of the current $130 (with shipping price -google shopping.) I just bought 3 for a great deal from zzsounds, and I got a used yamaha rx-v663 receiver for CHEAP on ebay It seems pretty comparable to the Onkyos mentioned, and got great reviews for audio performance.
I appreciate reading advice in this thread for cheaper quality subwoofers:
"For a starting subwoofer I would at least aim for eD A2-300 or HSU STF2 or SVS PV10 depending on your budget and preferences." I'm wondering if any or all of these are modifiable, and would modding these or a Dayton 12" with bracing, sound-proofing etc achieve performance comparable to say $1000+ subs?