You guys could really help your store by doing a "buy it now!" on the recommended systems, linking to the package in the store.
I know you don't carry everything that you recommend... but a package purchase of what you do carry and recommend would probably get some traffic going for you. Heck you could form partnerships with monoprice and a pioneer dealers to push purchases to them, you just handle the "one click" shopping cart.
The other hand of this... how are you going to "prove" that you are recommending stuff because it's the best option or because it is the most profitable for you? This is something that is really hard to prove... and thus comprimises your recommendations, no mater how "fair and even-handed" you are with your recommendations.
On the third hand (yes... living in a cave does strange things) maybe this means that your recommendations will be updated more than once a year, which would be a good thing!