Sunjan hits the nail right on the head.
FWIW, it appears to me that you keep wanting to come back to this list and ask the same question until someone tells you...yes...here is a GREAT sounding solution...AND it costs $100. The problem is, that solution just isn't out there.
I would add that the bird people are just that...they're bird people and they are not technical geeks that deal with quality in recordings, such as you have in the audience you've got on this forum. So the bird folks that use their irivers are probably just all on the same bandwagon...that's fine for them and I guess it must meet their needs, but you've spelled out a fairly concise set of criteria with your original post and people on this list have answered you with quite a high degree of diligence, yet you seem to keep coming back and asking the same question. What do you want or expect out of this forum?
The bottom line is the recorder you choose is simply a device that records whatever bits get sent to it by a microphone...whether it's an internal or external mic. If the mics on the recorder are garbage, then you're gonna get garbage sound. OK, added to the 'quality of recorder question' that some recorders have a lower inherent noise floor than others.
Something that hasn't been mentioned in this thread is that a reason the R-09 is more expensive is because it records in 24-bit...which again is going to provide some additional sound quality that you desire.
To support some other opinions that have been offered, I've also recorded with the R-09 internal mics and while they aren't ideal, they are plenty sufficient for the needs that you describe. I recorded some music with the internal mics and thought they were surprisingly nice sounding.
But if you don't want to spend the $$, then you'll get what you pay for and, based on your criteria, you probably won't be happy...it's that simple.
If you're waiting for someone to tell you that the internal mics on XXX recorder which costs $100 sound REALLY good, you're simply not gonna get it from anyone here!