I have the Blackburn cage holder because the front is not connected, so that they bottle can be pulled in and out easily because the cage holder does stretch a little. I HATED my specialized bottle cage holder which would not easily release my insulated water bottle. So, I would go back to the store and bring your water bottle to the store to try out different water bottle cage options

As to the saddle bag, I learned my lesson. I actually took my bike to the store and tested the saddle bags there. Because saddle bags do hang differently depending on the bike saddle. Plus, then you can try out the zippers and see how you feel about the space issues and how your bike rear light hangs on it. I like the saddle bags that have the extra zipper at the bottom so that I can enlarge my saddle bag if I go on longer miles for extra Cliff bars or a small shrug.
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2012 Specialized Amira Elite, upgraded carbon handle bars, Jett saddle 143mm switched to 145mm 2012 Selle Italia Max SLR Gel Flow saddle
2010 Santa Cruz Juliana with R kit and Crampon pedals
2011 Specialized Ariel Sport,suspension post,Serfas Rx Women's Microfiber saddle (sold)