You will have to do your own research but here are some ideas. I had a Chase United and added 4 more Chase in 10 months without the slightest hint of trouble. Given that you can transfer Sapphire to Hyatt there is a possibility right there, not that I would burn those in that way. Better used for airfare in my case. The Hyatt gives two free nights anywhere on signup. Must be used in 12 months which requires care; I and my wife each got it so 4 free nights, but we had a trip to Paris already booked with an apartment and so could not use the nights there which would have been pretty cool. Now we are looking at the deadline wondering where to use and not lose those nights, looks like it will be Chicago Park Hyatt but clearly could have been planned better. I suggest waiting and getting the Hyatt within 12 months of a trip to someplace $$. We did convert Sapphire to Hyatt for a week stay at Andaz NYC and that was so nice. SPG miles-and-points can be good, the Million Mile, TPG, and Award Guru blogs each have a different take and can be a useful read.

Note that my experience is based on staying at luxury hotels, I do stay downmarket but usually pay cash for that. Your style may be different. Priority club might be better for the more ordinary stays. PS I am in Saettle, pm me with questions if you want. You might consider Priceline for the hotels, the downtown hotels are pretty nice and there are too many of them and the pricelining can be good.