No experience of the tranny but a quick look at the ibis website says it optimised for 100mm forks. Don’t know how it would be at 130?
Something like the Cotic Soul would certainly fit the bill on 1×9. Ran mine at 100 for years, currently at 120mm. Its got up to 140 these days (old ones like mine to 130). It’s certainly not harsh! Drawback is that it’s 1.3 pounds heavier but if you are mainly no hills then this shouldn’t be a problem. You could spend the extra £700 on light wheels and finishing kit. there are a lot of happy Soul owners out there. We can’t all be deluded.
For the kind of riding you intimate I would probably run the soul back at 100 which gives more than plenty up front and keeps the bike fast in the twisty. Leaves you 30mm spare for the days you get some hills to come down…
I’m sure there are other frames out there worth considering too, don’t have any experience of them though.
Would you be missing out on a lot? Can’t really see how. Except if that’s the bike you fancy then what the hell. Logic goes out the window in these situations 😀