I really like my TX-NR5008 which drives my speakers wonderfully.
From what I have learned, the major differences between 5008 and 3008 are: 1.Watts 2. DAC: PCM1795×6 (192 kHz/32-BIT) for 5008, PCM1796×6 (192 kHz/24-BIT) for 3008. Actually, I haven't found any model from other brands carrying such high end DACs like 5008 does. 3. Improved high current power supply. 4. gold-plated speaker posts. I agree with what JohnK has mentioned that 3008 is more cost efficient but if you have the budget, I would recommend 5008.
Highly recommended to purchase a projector to complement the home theater. I purchased Epson 8700UB and projects the image to a 119" screen. Paired with Axiom speakers, there are really no reasons to go to the theater (except 3D) any more if you watch movies or concerts in blu-ray.
