Craig, I have the HKS weld in BOV's and I really like 'em. I have the ones listed on Johan's site.
As for turbos, Matt Monet from Dynamic Racing has a nice upgrade. He also has the wategates.
http://www.dynamicracing1.com/customer/home.php?cat=188
One thing though, if you plan on running boost any higher than stock, I would not trust the ECU to control boost. You should invest in an electronic boost controller. It's been proven that the stock controller has a problem controlling boost spikes when you upgrade the turbos and/or wastegates.
Gonzalo