If you're scanning and printing I've had good results with both film types, if you're sending out a slide or neg to be printed go for slide, as you'll get more accurate colours. Neg printers will have to use their own interpretation for colour.
If accurate exposure may be a problem use neg, you can set the camera to 800 iso without special processing and still get a decent result.
If I didn't print my own negatives I'd use slide, as I assume you want punchy accurate colours, slide has an advantage here in my experience at least.