As Trav and Pat were saying, if you're more comfortable driving an automatic, hey, your car and the only person you need to please is yourself.
On the '05 v '08 debate, I have both DE and HR, and hands down, the HR is a lot more refined between them. I LOVE my '03 and it is my forever car but if I didn't have that and was shopping, it'd be for an HR equipped Z33/G35 or Z34/G37 (which I had).
Two cents, devalued. YMMV