For a heavy level wind setup - Penn 345 GTI, a lighter level wind setup Penn 330 GTI..
For a non-level wind - Penn high speed senator 4/0 for a heavier or 3/0 for a lighter..
The Penn 309's work, the cheaper non-level wind Penn's work.. the regular senators work too..
The GTI's level winds mechanisms be unrealiable, the 330's and down may get screwed up - the 340's and up are supposed to be better.
High speed to a degree is good, you've got lots of line going straight down & it's nice to be able to quickly clear lines or haul fish up. I like my 345, it's got a nice comfortable handle and is fairly quick, I don't have to worry about putting the line on straight - just winch it up.
I can't speak for the other brands, but when Penn makes a reel to match the Shimano's, and the price is equivlant, why not buy from the US company?.. Another thing to keep in mind is Penn parts are much easier to come by, after years of use any reel is bound to need a part or two.
Jon