<human>: Give me the gist of the text in a nutshell

Hi PF - I lurk here a lot, but this is my first post. I re-read through the wiki but still torn on what to do with new extra income. Help?

My SO just started receiving commission checks. We used the first one to pay off a high-interest cc that had about $1050 on it. Now that he's about to get his second commission of $650, we don't know if we should save it or use it to pay down other credit card debt.

Current CC debt: ~$8,400 between 2 cards, one at 15.99% and the other at 17.99%. Plan to pay off cc in 2 yrs regardless of commission.

Current savings: ~1.5 months of emergency savings (we'd have closer to 3 months but we owed taxes this year). Plan to save and build this up in about a year regardless of commission.

Our goals: We just got engaged and are saving for a wedding aiming for Spring 2017. A hefty amount of the cc debt came form my engagement ring. We estimate our total wedding budget around $15k; about 8-10k will probably be from us out of pocket. **If we don't have the cash on hand for the wedding, we will probably utilize the cc's mentioned above.** 

Other financial info: We both have student loans and car loans, but because they range from 3 - 6.9% in interest we're not looking to pay those off with the commission (yet). We're renters so no mortgage. We both invest in our company's 401ks at full matching.
<bot>: $650/month of extra income; already have a plan for saving and paying down debt. Is it better to use this extra income to pay off $8,400 in cc debt or save for a wedding?