I know this isn't the best category for these type of devices, so mods please move it if need be. I have quite a few conventional mechanical mods right now and am considering something different. Unregulated, but with some circuitry. The DOVPO GX-200 and Tesla Two Sub Box both interest me. I'm just curious if one is better than the other in terms of quality, durability, longevity, etc. Any input and/or advice you could provide would be very greatly appreciated.