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Garden
1) Close Credit One. You don't need it and it chews through fees like nobody's business.
I was going to suggest Lowes, but I see that you have one. With the double cash promotion going on, Discover IT might be a good call with 10% back at hardware stores next quarter and I think it has Home Depot on its Discover Deals page (not entirely sure atm).
Why do you want a spree? What are you looking for? Cash back? A specific type of rewards? Could you break down your spend for us?
I was in your shoes 2 months ago. I had 4 cards when my mortgage closed. I app'd for Discover and Delta Gold and both denied me. I then went on Credit Union app spree and picked up about $75K in SL. I closed 3 cards that had CL of under $5k.
So now my Average SL per Card is about $10K; the lowest is $5K and the highest is $25K. I would recommend Navy Federal CU if you qualify. If you do not qualify then marry someone who does. If you are already married, adopt a child who qualifies. Navy Federal is the largest credit union in the world. They are dedicated to supporting the Military members and their extended family.
So seach the other threads for the "best" credit unions. With your scores, you should be able to get $100K in SL as long as your income can support such a CL.
Good luck and let us know how you make out.