I just won a settlement and have around $8000 i'd like to invest in just the sub woofer area. I have had subs in the past currently running 2 SVS 25-31 CS+'s (living room) and dual sonotubes with 2 Tempests in each running off of 2400 watts(HT room). I want something that is going to stick out and blow away anything I ever heard in house. What about 4 Tumults with around 4000 watts (1000 each) each sub in a 5 cubic feet box tuned to 18 Hz with 35 square inches of vent (say, 17.5" by 2") 51" long. I haven't really dwelled in the area of PR and am confused as to how to tune them. They do take the place of a port correct? Anyway suggestions needed along with a nice earthquake insurance company.