Purcell would have expected some sort of meantone.

This an attempt at a HIP version, though at near A=440:

Purcell Quartet

That's the speed I'd do it at, or maybe a bit faster. Works okay in B flat on a descant recorder (doing it in A would get nearer to the original pitch, though Purcell would more likely have expected something like A=390, or roughly A flat). There are lots of slower versions on the web - the Jane Austen industry seems to prefer their hornpipes soporific. The concertina players on YouTube are all over the map in their tempi.

IMSLP scores - Loris Gerber's is maybe the most useful.

A bit of grubbling around YouTube came up with another Purcell hornpipe I like better, with some interesting syncopations:

http://www.youtube.com/watch?v=DRXtkc8y394
Score: Hornpipe in E Minor from The Old Bachelor, Z. T685