I see Apple has added a lower price refurb 3.06 previous generation (I've been waiting ) price $1599. Total with tax $1710.00 New 2.93 at Powermax no tax total $1788.00. What would you advise? I also see 2.8 Intel® Core2 Extreme for $1299 + tax. What to do? New or old? If the 3.06 was a bit cheaper I would definitely go for that as I think it is better machine, but for so close a price is it better get new? Thanks!