If you are after more aperture than a PST (which actually does a pretty good job, even with 40 mm), there is a new company starting up called Lunt Solar Systems
http://www.luntsolarsystems.com/ It looks as if you could get a 60mm scope (without a central obstruction) for about US$900, which is very good by Hydrogen alpha standards.
It is worth going to a dealer or club member who has a PST to see if it is what you are after. As with all things astronomical, the images taken with these instruments are much more contrasty and detailed than the view through the eyepiece.
Cheers,
David