Putting aside the advice everyone (literally, everyone) here will give you, which is to spend less on the recorder and use the saved money to buy inexpensive external mics like the Church Audio CA-14 and a battery box (less than $200 total), the recorder I see used the most with internal mics, and occasionally by folks who actually know what they're doing, is the Zoom H4N. For example, Jerry Bruck of Posthorn told me he's used an H4N in a pinch and liked it; I've also seen touring FOH engineers run them for the band's mix. In fact, I never see anything but that unit being used that way.
The H4N also has the advantage of having 4-tracks, so you can get a 2-channel soundboard or external mic feed into it as well if at some point that's an option.
But, for the $300 or so price of the H4n, you could get one of the very inexpensive Tascam machines, some CA-14s, and a CA battery box, and come out at the same price with better audio performance.