My favorite outfit is:
Loomis IMX CR721C Light action, 6', 6 - 12 pound test, 3/16 - 1/2 oz.
paired with:
Shimano Core 100MG (weighs less than a spinning reel at 6.1oz and 90 yds 12#)
I can cast anything from weightless 3" skinny Senkos to 3/4 oz. 4" swimbaits and it's so light and sensitive anything I catch with it is a thrill.
The 3" Senkos I mentioned were castable with 8 pound test, but I am currently using 10 on it. I fished almost 100% spinning for the past 10 years. I do have to watch it with those, but hey, I also had not used a baitcaster for a long time!
This was only since September, and I bought 2 more baitcasters since then..another Core and the Curado E. The Curado E is a VERY good casting reel. I have read that the new Citica is NOT as good with lighter lures.
I am still amazed at how much more fun a "Good" baitcaster is to use.
Hope this helps