I think it depends on what kind of conditioning you want, strength or moisture? If for moisture, there are many store bought conditioners that are great. You may also try a hot oil treatment, and sit under the dryer. I'll bet you've got some cheapy conditioners under your sink that you could mix up with Extra Virgin Olive Oil - that would save you a trip to the BSS.
Funny you should ask, because I am about to do the same thing...I like to clarify first (use a gentle clarifying shampoo ~ Herbal essences purifying) because I want to start with a 'clean' slate, I want to be sure the silicon products i use aren't blocking any moisturizers. I'm not sure if this really happens, but I want to be safe rather that analyze all the indgredients in the products...
I then shampoo with a moisturizing shampoo (Nexxus Therappe). I'll throw some conditioners together (Suave, Queen Helen's Jojoba Hot oil treatment, DPR-11) along with some EVOO and mix, slather on, and sit under the dryer for a while. I could really just do it with the Suave condiitoners and EVOO. EVOO boosts up any conditioner, IMHO.
Then I'll rinse. If I like how it feels, I'll towel dry and style (airdry in a ponytail). If not, I may throw some other conditioner on top, for slip (Pantene Smooth and sleek, for example). I also like to use my rinse out conditioners for leave ins; Humectress is great for that, but I've used Suave Citrus smoothie mixed with oil (jojoba or olive - others will work too, I'm sure) .
Lately, found that clear, heat protecting serums work great on my wet hair for detangling, also smooths the hair shaft when dry, a nice, silky smooth feel, even where the roots are growing in.
HTH