I had a lot of the same questions. Finally sought some advice from members on this forum (great resource btw, thanks to those who offered sound advice, Merlin in particular).
Took me a while to figure out what I "really" wanted. Something for both visual and digital, something flexible and portable. Decided against a dedicated scope, as one more scope around the house will just get me into more trouble with the better-half. So, a white-light filter for the SCT and etalons for the ED80. Allows the solar components to easily fit into a small pelican case.
As for the Ha-filters (etalons)... The following threads may help.
http://www.iceinspace.com.au/forum/s...ad.php?t=84303
http://www.iceinspace.com.au/forum/s...ad.php?t=84215
http://www.iceinspace.com.au/forum/s...ad.php?t=72540
OIC!