It's surprising how few people realize that black hole isn't necessarily better then rakata. There are some black hole pieces though that have good.mods and enhancements in them though and you can buy those to optimize your gear if desperate.
Wrong, rakata and black hole have the exact same mods, armorings, and enhancements just a higher stat budget.
I do agree that the BiS mods ect. might not come in the piece you bought, but for each class there is only really ever 1 piece that has bis stuff in them.
The part i made bold, thats called min maxing. If your not doing it, your only hurting yourself and your raid cause you cant carry your weight...