Very good point about the price of digital SLR dropping in price far faster than the lenses in question. I would have to say that I am about 98% convinced I should go for the lenses.
I have had the opportunity to play with the 300 F4 AF-S, and I was very pleased with it. I have noticed a good percentage of my shots are with my 80-200, so when I eventually purchase the 80-200 AF-S, I will also purchase a TC20E when cash permits. This will give me an 160-400 f5.6 which is pretty close to a 420mm f5.6. I figure spending $600 for the teleconverter is better than $1200 for another lens... not to mention the weight and physical space savings.
Thank you for your reply, it looks like I'll be ordering up some new lenses. Too bad, almost every reputable mail order company is out of stock on the 80-200 AF-S. I did see cameraworld dropped their prices on the other two lenses I want though.
Thanks Alan, and thank you to everyone else who responded.