Just a suggestion: Whatever combo (Spin/BC) you choose for your finesse presentations, you can increase the sensitivity an incredible amount by properly balancing the outfit.
Ideally, a finesse rig is a much lighter (weight-wise) rig than your standard outfits. To really key in on subtle bites, bumps and nibbles, balancing the outfit (butt-weighting) for the technique used will increase your feel and dramatically increase your bite to hookup ratio. For soft plastics (drop/down-shotting, T-rigging, split-shotting) I'd recomend a balance to where your tip is nuetral in the 10-12 o'clock position. This is generally where you are doing the most rod articulation of your bait. For C-rigging, a nuetral weight about waist level is ideal for the sweeping motion most recomended. For crankbait/jerkbait/spinnerbait, I prefer a tip heavy or 4-5 o'clock weighting to keep my rod down and pointed towards my bait and the strike. The weighting needed to produce these affects at the butt are equal to a small stack of fender washers or about a $1.50 in quarters or less, slid into a butt cap or saltwater gimbal cap that is slid over the end of the rod. Many pre-made balance kits are also available. (These are just a few examples. Experiment with your own styles and techniques for a custom balance.)
Overall, definitely lighten up your finesse rigs for enhanced feeling. To really "kick it up a notch", balance the rig for the appropriate style/technique and your bite sensitivity will increase tremendously! I've never heard of anybody regretting their balancing of their outfit. Usually, when one gets balanced, you'll want to do them all! Good luck!!