AVR-Chat

Ok, I hope this message isnt the start of a huge thread, but I would 
like biased/unbiased opinions on what you guys recon is the best 
compiler for the AVR microcontroller.

Basically I want something that is cheap, ideally comes with a 
fuctional IDE and is quick to code with ( has built in libraries, 
language maps easily to AVR, and is as high level as possible) and 
at the same time has the abilty to do low level stuff when speed is 
required ie: inline assembly. It needs to compile fast and generate 
small code and needs to support AVRs which have no RAM.

Not too fussed about language as long as it meets all my above 
criteria, but I suppose I have some preference to C.

Hope you can help
Mark.