Definitely try it before you buy. I had one several years ago and it was heavy and felt like a jousting saddle. You are definitely locked in IMO. I sold it for $1200 and was glad to see it go. The interchangeable gullet was a PIA and not a fan of CAIR.
Could maybe be a decent flip if the right person comes along. This saddle was popular in the early 2000s but the CAIR was a no go for a lot of people. Speaking of Hennig, my barnowner is getting a new one for a cool $6000. Hopefully you wouldn't get stuck with the Bates if you got it. Good luck.
They actually do seem to fit a lot of horses, but of course you need to try before you buy. My very sensitive chestnut mare loves my Bates with Cair. The Cair panels feel hard when they are cold, but heat up quickly. You will feel that they are warm when you take it off the horse.
I personally don't love the fit & feel of any of the Bates saddles. But I'm living with mine for now, because my finicky horse approves and I can finally get some productive training done.
$800 is a pretty good deal for a 2011 Innova. Also, the interchangeable gullet was supposed to be made easier with the 2011 models. If it fits your horse and you don't hate it, it might be a good do-for-now saddle until you can afford that Hennig of your dreams.
"You become responsible, forever, for what you have tamed." - The Little Prince