thanks for the suggestions. I'm looking into your suggestions. I loved the 12W7, but I just can't justify spending that much money on another one, especially after having blown one and cracking another one. The specs on the Orion H2 are impressive (comparable to that of the W7... but much cheaper) and Audiobahn subs seem to have very good reviews from what I have read so far. Does anyone have any advise about Audiobahn? Here are the some specs on the subs that I was considering if that helps.

Orion H2 12.2/4
Max/RMS: 2500 W/2000 W
Sensitivity: 88 dB
Freq Response: 30 - 2500 Hz
Voice Coils: 3" Dual 2/4 ohm
X-Max: 1.14 in
Sealed box: .5 - 1 cu ft.
Ported box: 1.0 - 1.5 cu ft.
Cost: $225

Audiobahn Eternal AWES12P
Max/RMS: 2200 W/1100 W
Sensitivity: 92 dB
Freq Response: 18 - 500 Hz
Voice Coils: 3" Dual 4 ohm
X-Max: .51 in
Sealed box: 0.75 - 1.75 cu. ft
Ported box: 1.0 - 2.8 cu. ft
Cost: $170

Audiobahn Flame Compression AW1208T
Max/RMS: 3000 W/1500 W
Sensitivity: 91 dB
Freq Response: 20 - 500 Hz
Voice Coils: 3" Dual 2 ohm
X-Max: .79 in
Sealed box: N/A
Ported box: 1.30 - 3.15 cu.ft
Cost: $190

Audiobahn Flame Q AW1206T
Max/RMS: 2200 W/1100 W
Sensitivity: 96.4 dB
Freq Response: 20 - 500 Hz
Voice Coils: 2.5" Dual 4 ohm
X-Max: .71 in
Sealed box: .5 - 1.25 cu ft
Ported box: 1.30 - 3.15 cu.ft
Cost: $115

SoundStream Tarantula T4-12
Max/RMS: 1800 W/900 W
Sensitivity: 89 dB
Freq Response: 25 - 1700 Hz
Voice Coils: 3" Dual 1 ohm
X-Max: .63 in
Sealed box: N/A
Ported box: 2.2 cu. ft
Cost: $185

... and finally just for comparision ...

JL Audio 12W7
Max/RMS: 1500 W/750 W
Sensitivity: 86.2 dB
Freq Response: ?
Voice Coils: Single 3 ohm
X-Max: 1.15 in
Sealed box: 1.35 cu. ft
Ported box: 1.75 cu. ft
Cost: ~$600

Anyone know anyone who can help me tune this in the Pittsburgh area (Greensburg)?