I'm toying with the idea of replacing my 24" fork/wheel combo with a 650c.

I know it will make the angles a little more slack. Any thoughts on this? How can I measure the angles, and any idea how much it will change the handling on my bike?

Also, any good forks? The Profile Designs BDC bladed fork looks kind of cool (and sort of matches the style of my bike).

Any comments (except from sbk about how much he dislikes pursuit bikes) are welcomed.

Don't do it, man. Besides the head and seat tube angles being more slack, the trail is gonna change too. Maybe these changes won't make an ill handling bike, but 24" front wheels are hot. The very best thing about a 24" front is that you get a nice short wheelbase with no toe overlap.