May I suggest the ED80.
It is a very very good scope for solar viewing and imaging, and you still get to use it as a telescope at night (or day) which you can't do with a PST.
The solar filters for the ED80 are a lot cheaper than for the 6" SCT too.
The solar filter that fits the ED80 is the one for the ETX 105. It fits perfectly onto the Dew shield of the ED80
