I do not have that combo but something close:
TB2's driven by a 4B SST
Velodyne HGS-12x sub crossed over with a Bryston 10B
the above is used for 2 ch listening
for HT use, I use the Bryston SP 1.7 xover and run
four SVS ultra 12 passive subs
I have to go by memory as all the gear is in boxes now

I actually looked at getting a TLE1 previously (5 years ago) but I felt it was over priced even in the used market. It was basically twice the price of the HGS12 and on paper the HGS12 is a better preformer. I have never listened to the TLE1 but I can see that in some situations it would be ideal such as small listening areas where quality(minimal distortion) over quantity (deep extension) is desired. In any case, I am like you waiting to upgrade to the bigger PMC's. The real key in making any sub / satellite combo work is the integration so you would need a good and flexible cross over. I would see if you could borrow a "decent" sub and cross over which won't be cheap and try this out. If you can't find the ideal sub location and proper integration - all bets are off.
For the price of the TLE1 - I would go for the bigger PMCs especially since you are running 2 ch.