Solid State Integrated in 1500- 1800 range ?

Look into Accuphase and Mcintosh - I own both and they are great!

The Creek 5350SE is excellent. However, it is only 85 watts per side. I would question the ability to get the most out of you Theils. And especially if you are going to want to drive planars. You will want more power. Muscial Fidelity makes the A300 which is 150 watts per side. That might be a better match and give you the ability to swap different speakers in and out.

The Acurus is not a bad choice. Some will say it sounds no good, but I beg to differ. In a way I believe you get what you pay for. The one I am speaking of is the Acurus DIA-150.
It is also much less than you were thinking of spending at around $750. Look at this review : http://www.hometheaterhifi.com/volume_8_3/acurus-dia-150-integrated-amplifier-7-2001.html

If anyone knows of a more powerful integrated than this one you should tell us. I would like to hear also.

As far as separates go, would you consider those too?
You could afford to get a top-of-the-line acurus set up, probably under $1000.
Then you would have 200x2 into 8 ohms, 300x2 into 4 ohms.
Dont believe all the negative comments you hear about Acurus from others who will soon be saying it doesn't sound good at all. It is made by the same people who make Aragon and the goal they had when making it was to make it very transparent. I currently use their top-of-the-line set up, Acurus A200 amp & Acurus RL-11 preamp, and although I am thinking of moving on to Aragon, this is not in your price range, is not integrated, and once again I feel that the Acurus is pretty good too.

As for experience, I have been into this for 10 years, but am sure their are many much more experienced opinions out there than mine. .02