If you're going with something simple, cost-effective, and set-up mostly for street with occasional track days, here is what I would recommend, starting with a bone-stock car:
Engine: keep it stock, don't even pull the heads, keep the factory original head gaskets on it, keep the stock cam and valvetrain in it. Two exceptions: install new valve springs, and install a new timing chain.
Turbo: TA-49, TE-44, or 5857 (TA-49/TE-44 is more cost effective). Honestly, keeping the stock turbo and turning up the boost will be fine on the street.
Injectors: Might as well go right to 60's or similar, since they really don't cost much more than blue-tops, etc.
Air Intake: Any cold-air kit and/or hard MAF pipe with K&N.
Intercooler: A stock I/C with a Dutt neck is fine. If you want to spend more money, there are many SLIC's and FMIC's to choose from.
Fuel Pump: Hot-wired Walbro 340 or similar, lots of options here, also an adjustable regulator.
Exhaust: There are many upgrades to the stock exhaust - pick one that you like. I would suggest spending money on a test pipe and free-flowing cat-back first, then spend money on an improved downpipe later.
Tranny: a good-ole orange stripe converter or similar along with a moderately upgraded transmission. Unfortunately, leaving this stock just won't work for any length of time.
Alky: if you stick with 93-octane on the above combo, your car will run easy twelves. Add alky, and your car will run high-11's, but you will run a higher risk of breaking stuff.
Chip: Turbotweak or Extender chip (if you want to invest in a MAF translator, which will improve drivability) to match the above.
Tires: Drag radials - regular-size street tires on this combo will get blown away every time the turbo spools up.
The above, proven combo is very fun on the street and can easily click-off 11's at the strip (with race gas or good alky). There is a low risk of breaking stuff unless you do something stupid (like run out of alky). I essentially have had the above combo since about 2003, and I love it. No, you won't have the fastest car in your state, but you will have a fun, fast, relatively reliable, and relatively inexpensive car. With 100-octane unleaded and slicks, I've run mid-11's at the track (see my sig). On the street with 93-octane, I get very quick spool with minimal effort. For "fun" factor, you can't beat it, IMHO.
16psi is all I run for now and the drag radials wont hold so its lots of fun the car runs 12.3-12.0 at this boost level depending on the timing and I just mix 93 and E-85 so its simple. As soon as I hook up the alky I will probably run 19-20psi Either way I love just jumping in the car and going and not having to worry about anything really.
