In regards to the turbo kits in the link above, the "superior" turbo kit does not include the intercooler or BOV, same as the basic Greddy kit. You'd have to buy those extra. The "Extreme" kit does include these. Also, like most turbo kits, it uses a Fuel Pressure Regulator and a map sensor by-pass of sorts. If yyou have the $$, Hondata w/ boost option and some new injectors is a better way to go in terms of fuel managment, but this would cost extra no matter the kit you buy. Almost it's a better fuel managment method, no kit's that I know of use a Hondata, almost all use an Fuel Pressure Regulator and some sort of map-by-pass or upgraded map sensor instead.
As for XS Engineering, they are a very reputable turbo company and makes good stuff. If you buy XS-Engineering, I wouldn't by off of ebay or anything. If you want to buy a pre-made turbo kit, buy one from a reputable distributor of the manufacturers products and not from a place like ebay.
http://www.xs-engineering.com/