So do you think you will order a 2.8 with 2 CPUs for £100 more?
COST. I'd love to do that otherwise
If you add Wi-fi to the current 2009 system, you get less for £1,938.99 in the 2.66Ghz 4 core Mac Pro than you got for £1,459.99 last year with the 4 core 2.8Ghz system, considering there's 3 practically useful RAM slots and the previous 2.8ghz 4 core system could use 2Gb RAM modules to "Cheaply" go up to 16Gb, maintaining it's full memory bandwidth. 12Gb using expensive 4Gb DIMMS is the only option for the 2009 model and I highly doubt from most benchmarks that the new 4 core Mac Pro is significantly faster than the old 2008 model. At least across the board.
I've seen last years' 8 core 2.8Ghz system on eBay for just over £1,500 which wouldn't be too bad if it was directly from Apple as a refurb/Clearance item but used system prices have become a joke over the past few years. There's even people having the cheek to want £400 for a used 1.83Ghz Mac Mini on eBay and they were selling for £325 on the Refurb/Clearance section of the Apple Store when the new models came out!
The used prices should be more reasonable like this:
Apple Store Prices of OLD STOCK / Private Sale of USED system
2008 Mac Pro 2.8Ghz 4 core: £1,299 / £1,200
2008 Mac Pro 2.8Ghz 8 core: £1,599 / £1,400
And not a penny more
If I find a 2008 Mac Pro at some stage when I'm more capable of raising £1,200 to £1,400, I'll be looking for one of those systems. I'm really thinking I'm priced out of anything other than an entry level Mac book these days!
If you look at the cost of RAM upgrades it gets worse, lets assume you want maximum bandwidth and exactly the same amount of RAM (12Gb). It works out like this:
2008 Mac Pro + 10Gb Crucial RAM (all 8 slots MAX bandwidth):
2Gb (2 x 1Gb included with system) + 4 x 2Gb (£210.44 crucial) + 2 x 1Gb (£62.09 crucial) = £1,732.52 total
2009 Mac Pro + 3 x 4Gb (£1108.59 Crucial) =
£3,047.58
And you've had to give up the 3 sticks of RAM it came with and leave 1 slot empty to maintain interleaving of the DDR3 it uses.