i'm going this route also, i've been putting it together for a little over 6 months, I have almost everything i need except the S/V-afc and my intercooler/piping. I'd stay away from the t-25 turbo's they're way to small for our cars. You can look at some mhi (mitsubishi) turbo compressor maps at this site.
http://www.stealth316.com/2-3s-compflowmaps.htm, if you do the math for an H23, for 5 psi of boost you need around 160 cfm of air flow at 3600rpm, and 300 at 6500rpm. The TD05H-14b from the manual 1st gen. eclipses is on the small size, even the larger 16g isn't big enough. I know the whole point of using eclipse parts is to save money, so at least get a 14b, the t25's are way too small. However you can buy a used 14b and get a much larger compressor wheel put on it. For more info on this check out
www.vfaq.com,
Here he rebuilds a 14b with a 16g wheel, other people in the eclipse community have gone as large as a 20g. So this is possible to save a lot of money. And get a decent size turbo, with good numbers. If you need a list mine would be
used 14b turbo ~$100 (upgrade to 18g compressor wheel for $120+balancing)
used dsm manifold ~$25
450cc eclipse manual injectors ~$50
used S/v afc ~ $200
eclipse smic or starion fmic ~$40-130
map bypass ~$45 (you could use a plastic aquarium piece ~$8)
mandrel bent piping from jc whitney (for downpipe/ic pipes)~$50
1st gen eclipse bov ~$30
autometer boost gauge, oil temp gauge, a/f gauge ~$75
ss oil lines,vacuum hose and T fittings, bolts/screws, gaskets ~ $100
some form of pcv system, aka a dry sump breather tank ~$65
you might want an msd btm, but i'm not going to worry about it at 5psi. I've invested about $400 and i'm almost there, i'm a poor college student with no job so cheap is my only option. Check out ebay, thepartstrader.com, dsmtrader.com, homemadeturbo.com, If you look hard enough you can find good deals on everything you need. I'm hesitant to post all this before I complete my project, I'd like to have less competition in getting my parts, but for fellow luders I'll help anyday.