Hey SoyMac,
I think you're at the perfect time to sell if you need to. I think you've pretty much lined out perfectly that you need to get another way to perform your work.
I definitely think that the Macbook Pro will do whatever you need it to. All of the apps you use are Universal so, you're not going to see a speed decrease, in fact, you may see a gain.
If it was me, I'd probably invest in the new Airport Extreme (for your drives) and the new Macbook Pro.
Make your back happy!
Now is the right time to sell your old G5 if you're going to ever get rid of it. It's only going to go downhill from here.
I think you're at the perfect time to sell if you need to. I think you've pretty much lined out perfectly that you need to get another way to perform your work.
I definitely think that the Macbook Pro will do whatever you need it to. All of the apps you use are Universal so, you're not going to see a speed decrease, in fact, you may see a gain.
If it was me, I'd probably invest in the new Airport Extreme (for your drives) and the new Macbook Pro.
Make your back happy!