Questions - still learning the game!

I have learned the basic high-low count fairly well I think. Can someone help me out with these more advanced questions:

1) If I feel I am ready to add a seperate Ace count, what is best way to integrate it into basic play? Or do I need a whole new system?

2) If I have enough money to play a $5 table, should I still play a $2 dollar table and make minium bets when the deck is slightly negative, $5 at neutral, $10 bets at +1, $15 at +2, etc? When should I play 2 hands?

3) What is the impact of the count on surrender options (surrender is allowed against all cards where I play). It seems like I would start surrendering more liberally with a high point counts (16 to a nine, for example).

Thanks!