My learning curve in astrophotography has been very very slow. I did piggy back for most of the 1980's with camera lenses. Nothing changed much technology wise for ages. Then came along DSLR's. However it wasn't until 2012 that I bought a second hand Pentax K-x. I was amazed at how much could be captured with it. But it was a bit of a pain to go longer than 30 seconds without a software mod on the memory card.
I grew out of it pretty fast and purchased a second hand Pentax K-5. Much better than the K-x with lower noise and better results at higher speed. But it was still insensitive to Ha.
Around the same time I bought a quite old Nikon D70s that was full spectrum modified. It had good sensitivity to Ha, being modified, but the amp glow and noise were so bad it made it not really worthwhile.
So now my latest adventure is with an old second hand full spectrum modified Canon 1100D. It is the best of all my cameras so far, even though it is clearly noisier for any given ISO than the the Pentax K-5. Ripping that filter out makes it a beast!
So I'm usually two or three or more steps behind in technology, because I don't have the dollars to get the bleeding edge.
The main thing is, are you having fun? Cos at the end of the day, that's all that matters.
P.S. Here's my 6723 and friends --->
http://astrob.in/176242/0/