Update:
Today I went to the 2 major music stores in my area. One had the Highway One Jazz, the other had the Geddy.
On first playing the Highway One, I noticed it had a similar brightness to the Geddy. The neck was fast and it sounded great. I could get it to growl through a Hartke combo with aggressive playing and the bridge pickup slightly solo'ed. I was also able to get a warm, full tone with the tone all the way closed and the neck pickup solo'ed slightly.
When I went to try the Geddy a couple minutes later at a different store. I realized just how growly it really is. I played through an ampeg B2Re head and 4x10. With the bass boosted, the treble cut slightly, the bridge pickup completely off and the tone knob closed, I still got a big growl and no warm, smooth tone.
I'm still looking at those 2 most and It's going to be a tough decision. The Geddy's neck is great, I love the maple with blocks and it growls for days, but it's really difficult to make it smooth or warm for styles other than rock. The Highway one played great as well and would look great in sunburst with a tort pickguard but doesn't have quite the growl the Geddy has.
I'll have to order a highway one in sunburst in the coming months and then make a final decision. BTW, the newer MIM jazzes are surprisingly nice!