Hi Pete,
You may like to consider the TMB refractor:
http://www.astronomics.com/main/prod...duct_id/TMB92L
Or a TAK Sky 90 II. But you would need a reducer/flattenner for Astrophotography.
Dougs Canon 400 mm 5.6 looks pretty good for around $1300 or the Canon 200mm 2.8 at about $900.