The P-3000 is an awesome preamp. One of my reps dropped it by last summer and it held its own next to preamps in the $4k range. The Digital section was pretty good and added to the value of the preamp.
I wasn't all that impressed with the M-5000 power amp after testing it on about a half dozen different speaker brands even when rotating it with other preamps.
The Onkyo preamp vs value is a sure winner in my book.