I am satisfied with the X-man GT1756, but if I were to do it again, had more time to work on it, and didn't have to worry about e-checks, I would try to use a more modern turbo like a GTD####vrk series, or I would go with the GT1752. My decision to use the plug and play GT series options was based largely on having to pass biannual emissions inspections. Other options are actually visible if the inspector looks closely.
The GT1756 spools rather slowly. It doesn't reach 20 psig until around 2100 rpm. It's makes full 27 psig boost at 2500. The GTD vrk units are reported to spool nearly as fast as stock.
If you are up to a little DIY fitting like welding an exhaust v-band flange on the downpipe, and fabbing a custom boost hose, and don't need an option that looks very close to stock, I'd go with a newer style like the GTD, but I have no experience with them.
If you want plug and play that looks exactly like stock, the X-man GT options are great options. If you're retaining the stock injectors I'd go with the 1752 for the quicker spool. You won't be able to support the fuel required for the full boost potential of the 1756 anyway.
Either the 1752 or 1756 should work with the stock 3 bar sensor, but I'd recommend changing to a 4 bar if going with a 1756 to give you a little bit of margin for spikes. I had spikes well over 3 bar when we were trying to dial in the tune, and that was with an initial 2.6 bar target. We've got it cleaned up pretty well and with the current 2.9 bar target spikes are just below 3 bar. Consult your tuner, and take their recommendation seriously even regarding turbo options. You are marrying them.
Since my previous post I think Darkside has additional options, but I really haven't researched them.
I don't think chickensoup ever did a turbo upgrade. I believe he sold the car. Good kid though.
