I got that same offer and have already hit the $5k spend (thanks to some help from work and relatives) and the points posted right after I made it. The best redemption value is on airlines especially now that ticket prices are so high. British Airways, Delta, and a few others you can xfer to. Best to look up what airlines fly the most from where you are. Also, if they are part of an airline partner group (OneWorld, etc) you can use points on other carriers.
CCs: Chase Freedom VS 12.9k, CSP VISA Sg 13k, BofA Amex 24.5k, Discover 12.5k, US Bank Cash+ Visa Sg 17k, Macy's Amex 8k/1.5k, Gap Visa 10k, Best Buy 11.1k, Citi TY MC 10.8k, Citi AA Amex 6k, Nordstrom VS 10k, Costco Amex 12k, BofA CR VS 5k, Amex BCP 13.5k, Amex ED 5k, Sears MC 9k, HD 7k, Target 600, Amazon 7k, US Bank MC 15k, US Airways MC 8k, NFL Visa 4k, Patelco Visa 10k, Penfed PR VS 44.6k, Chase Hyatt VS 8k, Citi Simplicity 13.3k, PayPal MC 7.5k, BBVA Visa 4k, WF VS 14k, FNBO Amex 14.1k, OCCU VISA 15k, TR Visa Sg 16.3k, C1 QS Visa 11k, FRN MC 15k, HSN 4k, Saks WEMC 10k/4k, Chase Ink 18k, Arrival WEMC 10k, Ebates VS 8k, Orbitz VS 12k, NASA V 30k, USBk FP VS 21.5k, DC 30k, VirgAm 15k, Sams MC 15k, Amex Bz Gold, Amex SC 10k, BofW Bz MC 18k