I think you have to decide how much you really want the home theater and/or multichannel sound experience. Obviously, quality two channel sound is important to you as you've recently bought good mains. However, there are a only a limited, albeit growing, number of multichannel audio titles. You must also look at your room and decide if you have space to place the extra speaker. The Thiels throw a wide soundstage, and if you have a small room, you could probably do without. However, if room and money are not the issue, then why not have the extra speaker? if money is an issue, Thiel's SCS, SCS2 bookshelf speakers can be had relatively inexpensively if purchased on this site. Happy listening with your new speakers, whatever you decide.
Thiel owners, do you use a center channel for HT?
I have a new pair of Thiel CS2.4's. I was originally intending on the 5.1 home theater experience but am now pondering whether I should forego this for a dedicated 2 channel. The money aspect aside, do any of you with Thiels prefer a Thiel center and/or surrounds as compared to just the LR mains and a phantom center channel? One thing to note, I was also planning on multi-channel DVD-A and SACD, this ultimately won't affect my decision but I would like to explore it if the 5.1 is worthwhile.