DIR practitioner, $, Adjustable, LED & Ease of signaling? Unfortunately this is a lot of people dreams unfortunately to meet all those needs, you are in the $1200 - $1500 price range, especially when factoring good customer service if you were to have a problem. Going to get grief from this one, but big fan of HID - reason - everything that you stated. The only way to save $ maybe finding something used. Only adjustable LED Can that I know of is the MB-Sub VB-50 Cave, I personally do not see a lot (have only seen 2 locally) of these in the field and not sure about US cust service since I do not use them.
