With the delivery of my new scope imminent (

), I have started thinking about finderscopes. SDM (
www.sdmtelescopes.com.au) do offer these, but I am thinking I might sample the range of what is out there before settling on any particular one, SDM or otherwise.
My perameters are:
1. FOV of at least 5 degress
2. Light weight (bearing in mind balance issues with a 20" dob)
3. Right angle (to spare me from a sore neck)
4. Able to be removed easily for transportation (secondary cage has a fitted case)
5. Focuser
6. Correct image
7. Able to use 1.25" EPs
8. Dew shield / extended front tube
9. In keeping with style of my SDM scope (I was thinking brass

)
I have noticed Takahashi put out some excellent finderscopes, but not sure if they can be coupled with a diagonal??
Any thoughts / comments/ experiences much appreciated.