I am not a fan of the AVO turbos they are overpriced, you might as well go for a HKS turbo the HKS GT2530Kai and GT2835 (GT2530Kai would be what your looking for on a 2.0) will be close to the AVO 400 & 450 range which can be bought for a few hundred more than the AVO units.
Look on
www.nengun.com for good HKS turbo prices.
At the power levels your after cams won't be needed, but if you decide to buy them just get the Kelford cams from NZ they make the cams for Cosworth, you will save yourself a few hundred.
www.kelford.co.nz