I'd personally not buy the bundle, this includes 4gb of suitable Ram, a better cooler and is cheaper but if you want the guarantee I suppose you should buy the bundle or at least one of the guaranteed CPUs. The "@3.2ghz" is almost certainly achievable with any Q6600 and you don't need PC8500 to do so.
Intel Core 2 Quad Pro Q6600 "Energy Efficient SLACR 95W Edition" 2.40GHz (1066FSB) - OEM £99.99
(£117.49) £99.99
(£117.49)
Asus P5Q Intel P45 (Socket 775) PCI-Express DDR2 Motherboard £79.99
(£93.99) £79.99
(£93.99)
Corsair 4GB DDR2 XMS2 PC2-6400C5 TwinX (2x2GB) £43.99
(£51.69) £43.99
(£51.69)
Scythe Mini Ninja CPU Cooler (Socket 478/754/939/940/AM2/LGA775) £23.99
(£28.19) £23.99
(£28.19)
Sub Total : £247.96
Shipping cost assumes delivery to UK Mainland with:
City Link Parcel Next Day (Delivered Mon-Fri)
(This can be changed during checkout) Shipping : £8.25
VAT is being charged at 17.5% VAT : £44.84
Total : £301.05