Oh christ.....
I'll ignore the spam and answer your question......
Anyways, the main debate of switching to a more complex count is whether or not you can do it accuratly. If you switch to a system that gives you an extra .5% edge, but you can't keep track of the count accuratly and keep making mistakes. Then that extra edge is no good, in fact, that system, to you, is worse than the one you're used to. To say which is the best is impossible. I've known people who have had great success with all of them, it all depends on what you're comfortable with in terms of trading off simplicity for a statistical accuracy. If you think using Omega II is gonna help you out (which it is mathematically stronger then hi-lo, if I remember correctly.) then go for it, but it's going to take you a good amount of time to learn it correctly, and that time is going to take away from your E.V, until you get good enough that the stronger edge balances itself back out with the time you lost learning it, which could take a while.