ok guys, ive finally decided on the two ti's im giong for a sq system, either ported tuned to 31 hrtz, or sealed for the 2 15 tis, now my problem is, what size amp should i get, im thiking anywhere from 800-1200 watts rms each if u can give me links to amp you would get, i would really like 1 amp for each sub but a mono amp would be fine, theey are dual 4 ohm, so im lost in confusion, i have 500 to spend on amp(s)