Sweet lens you got there!

If you don't mind going over $200 just a little Berlebach has some quality tripods for new under $300. That's next on my list, unless I got a steal of a deal on a kodak portrait lens.

http://www.hpmarketingcorp.com/berlebach.html

Used majestic and ries are also universally well regarded. I have a cheap surveying tripod I use for my 8x10 camera. I have an adaptor plate to go from 5/8" to 1/4". It's not ideal in terms of features or looks, but it works well and was <$100.