Why don't you give us a little more information about what you are looking to accomplish. What are your listening habits (music or movies), what size room is it going into, what TV is this going to be hooked up to, and what media do you primarily watch (SD or HD). While you still need to audition this might be able to better point you in the right direction for both speakers and receiver.
I agree with the speaker suggestion. These are one part of your HT that will be with you the longest so you should spend the most amount of money on them and make sure you are completely happy. If you are like me, you will go through 10 different pj's, receivers, hd players, and amps trying to keep up with the emerging technologies. Speakers are one item that will stand the test of time.
Travis