A possible option to look into instead of changing out bars (and brakes) on a Ruby, only to change again later. This type of bike makes a nice around town bike.
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If nothing else,
a B-33 (saddle) wouldn't be a bad idea until the soft tissue in your spine fully heals. That could take a long time. It provides much more stability than a B-67. (A B-67 is often recommended for people after hip-replacement, etc. but that B-33 was sublime). Anyway, you can buy any Brooks saddle from Wallbikes, they have a 6 month return policy.