It is totally fine to use a different brand of subwoofer from the main speakers. The only consideration is that the subwoofer can go high enough to blend with the bass of the main speakers. The manual for the T101 recommends a minimum crossover setting of 120 Hz, so you want a subwoofer that can go up to about 150 Hz, which pretty much every subwoofer can do.
I would go with the SVS subwoofer. You cannot go wrong with SVS, as their subwoofer are excellent, and a good value. They have great customer service and a good warranty. You simply cannot go wrong with them.
And even though the SVS is rated only up to 130 Hz, I would not worry too much about that. I would set the crossover in your receiver to 120 Hz, and bypass the crossover in the SVS.
In the future, if you ever replace your main speakers, I recommend getting some with a -3dB point of about 60 Hz or lower, so you can set the crossover to the THX recommended point of 80 Hz.
It is totally fine to use a different brand of subwoofer from the main speakers. The only consideration is that the subwoofer can go high enough to blend with the bass of the main speakers. The manual for the T101 recommends a minimum crossover setting of 120 Hz, so you want a subwoofer that can go up to about 150 Hz, which pretty much every subwoofer can do.
I would go with the SVS subwoofer. You cannot go wrong with SVS, as their subwoofer are excellent, and a good value. They have great customer service and a good warranty. You simply cannot go wrong with them.
And even though the SVS is rated only up to 130 Hz, I would not worry too much about that. I would set the crossover in your receiver to 120 Hz, and bypass the crossover in the SVS.
In the future, if you ever replace your main speakers, I recommend getting some with a -3dB point of about 60 Hz or lower, so you can set the crossover to the THX recommended point of 80 Hz.