Nice SL and I'm glad it will absorb your BT nicely.
Many people to take on a Discover BT tend to report better luck with SP CLIs. That being said, I'd recommend trying for them starting around Month 4 of your account being opened. From there a good routine would be to request a SP CLI on the first Monday of the month following your updated FICO score on their site. If you're able to bump up your limit a bit more due to having that balance on there that will be a great thing since it will just drive that utilization down even lower. You may have more luck building that limit now with the BT balance present compared to 14 months from now after you have it paid off.
Congrats on your new card
I've had my card for about 2 1/2 months now. So far so good. I think you'll be happy with it.