The AVC-R is quite good. It is very nice looking, but very complex to set up and not great for high boost. Most people on here seem to like the Turbosmart E-Boost, but personally I like the Blitz SBC models. I have this one.....



The SBC I-Color. It is very nice, but quite expensive. It's predecessor, the Blitz SBC-ID is superb and the one that I would recommend. Here is a typical link.....

http://cgi.ebay.co.uk/BLITZ-BOOST-CO...QQcmdZViewItem

You can also add their 'Power Meter', which will give additional functionality, such as speed-based boost mapping and sprint times. Though, this is not necessary.

Lower down the scale is the GReddy Profec-B. These can be bought for under £200 and are quite good, though quite basic. The GReddy E-01 is another advanced controller, but I see no reason to go for that. Complicated, expensive and not that great.

HTH.