Actually you can taper them without cutting any fabric. They can rip the stitching holding the two sides up the outseam and just sew back along a different path. That way it could actually be undone later if you wanted to!
But yeah no matter what the inseam will have to be re-done so try and get chainstitch if you can instead of lockstitch, if you care about such things.
I think that second post-soak fit is pretty nice. They will break in and mold to your body nicely after a couple of months. Just make sure not to wash them too too often. If you can stand to wear them every day for a couple of months (3 or 4 even better) then that's always good but I've been washing mine every 4-8 weeks and still get good results.
Edit: before you get them tapered in, try rolling or cuffing the hems. At least give it a try for a couple of days