Hi Bunner! (I love your user name...I used to have a rabbit, and we just called him The Bun.) 
Everyone here has good input. The one thing I would add is to see if you can arrange for a longer, calmer test ride one way or another.
I remember trying to find my first bike. I really had nothing to compare anything to, so it was really hard to tell any differences when I rode. The traffic issue on test rides pretty much erased any way for me to tune into how the bike really felt.
There was one bike that I ended up not buying, and regretting it within a few months, all because the test ride was in traffic that I was NOT equipped to handle as a new person.
You might ask the shops if you leave them your credit card, your diamond ring, your firstborn, whatever...if there is any way you can take the bike with your car somewhere calm to really relax and see how it feels to you.
And, the sit bones are likely to be sore for awhile...even if you have the right shorts and a good saddle...my butt always has to get used to the saddle if I am off for awhile.
"The best rides are the ones where you bite off much more than you can chew, and live through it." ~ Doug Bradbury