Do it once and Do it right, if you lack the funds then wait till you can buy what you actually need.
I know JMCBOOST personally and have riden in his 2JZ NA-T swapped MK3, his exhaust sounds good and performs much better than the stock turbo exhaust on the car so yes a DIY setup like what Jesse has done will be much better than a stock turbo exhaust system and a LOT better than that NA setup you're looking at.
Just a friendly FYI, Spooner is absolutely right, MK3's are not cheap cars (repairs, maintenance, mods, it all adds up). If you want cheap power buy a fox body stang or something, if you want a nice performing modified MK3, especially one with a JZ either build it correctly or purchase one from someone whose already built it correctly.
If you choose to ghetto engineer the setup it will perform poorly and break often if you even make it run to begin with.
Good Luck and choose wisely