The SLE and SLT are pretty different pricewise and optionwise.
Regarding rebates, the competitive lease is 1500 and costco is 300-700 depending on membership level. I actually dont have the costco membership and they claimed you need to have had it for 3 months before signing the contract. Therefore, I took the original deal i received to the second dealer and was able to lower the payments by close to 20/mo and not use costco membership.
Feel free to share the 5k worth of rebates if you know them offhand and I will gladly use them to get it down!