Here goes
1. If you have speakers that are bi-wire capable and you're not sure whether you should biwire, the first thing I would recommend is to rip the flimsy bridge plates off and replace with a short length of your existing speaker wire.(unless you're using flex wire which you shouldn't)
2. I personally believe, whether misguided or not, that bi-wiring does have its merits. It is important to note that it is no good bi-wiring with great cable but your interconnect between player and amp/pre amp is bog standard. An all encompassing aproach needs to be taken when it comes to HC. I've read and agree with the recommendation that you spend aprox. 10 - 15% of your budget on cabling.
3. I have my set up bi-wired (well semi bi wired). My FR, FL, C are bi-wired with my surrounds single wired. My thinking was that 70- 80 % of movie sound info comes from your front three speakers so I would be prepared to spend the extra cash on the wire. To bi-wire the rears becomes a bit more costly but they dont carry the predominent sound info so I wasn't too concerned. With the rears I replaced the bridge plates with speaker wire.
For the record I think bi-wiring has made a difference to my set up. I also feel that some speakers benefit more from bi-wiring than others.(my kefs love it, they told me so :lol: )
Skinny