[Cornboy]

I don't know anything about clubs, I just go out there and hit'em. I'm about a 20 handicap. Couple club 101 questions:

1) So the basic rule is more loft = easier to keep straight?
2) I'm a long hitter, 7 iron is about 170, is there somethign specific I should be looking for in a driver? Someone above mentioned M and F, but I assume that is brand specific?
3) Is a lot of distance lost with a higher loft driver?

Thanks, I'm clueless about this stuff, and if I want to get better I should really learn. My driving has been so erratic this year, I'm hitting 3 iron of a LOT of tees.