if you hold out for a short bit the Incredible and all of the other phones will drop in price. There are at least 3 more advanced android phones coming out in the next few months that will drive the prices of everything else down.
Also, the incredible has about half of the standby time of the Eris. This is a big reason why I decided to stay with my Eris. Of course the processor in the Moto droid is the same "size" but the difference is the "bus" on it which does perform better in some cases. The sense UI is what is hurting the droid regarding performance IMHO but what it all comes down to is what you really want and when you want it...
Do some research, shop around and look at the upcoming phones (and release dates of them) to help you make your decision.
Personally, I went with the Eris because I thought it was going to have the flash included in 2.1 I got ansy and loaded a leak of 2.1 (which does not include the flash I was looking for anyway). So, from personal experience and things that I am looking for in my phone I would say that know what you want, know you CAN or WILL get it and then make your decison...
-lance