Thanks for the help guys, it looks as though this combination may well be ok.
John, the input impedance of my amp is 100Kohms (actually, a bit higher, I've just measured it) so thanks for that. Certainly the o/p cap on my Tube Dac is 2.2uF and that works well with the TX102. It seems that it will be worth experiementing with a few different values of cap in the Seduction to see what works best.
What I love about this hobby is that so many people I meet and speak to are so helpful! Many thanks once again,