The type will be vector, which is resolution independent. The type will output at the highest possible resolution available by the imagesetter or the print device – could be 600, 1200, 2540, etc., depending on the output device. So the resolution is only going to apply to any non-vector items.
Bring up your Type palette, and hit the flyout menu. Make sure Faux Italic is unchecked.
There might be a hot key to turn it on – not sure. But once it’s on, it stays on until you turn it off, despite changing fonts, relaunching, restarting, etc.
If you set the job up in Photoshop, send the print shop a copy of the file either in EPS format with the “preserve vector data” box checked, or as a PDF with fonts embedded. Then the type will be vector and will print crisply. Be sure to not use any faux bold or italic when you set the type in Photoshop – it doesn’t play well with “preserve vector data.”