every tuner i've talked to has said that tunning blow thru is a lot easier and a lot easier to dial in. I've heard that draw thur setups are harder to dial the MAF on, plus you'll never get a blow off valve on a draw thru.. all draw thru setups have to be revented where as a blow thru doesn't you can vent it into the air. I've not see any issues in installing the intercoolers into a sn95 car, it was really easy actually. But seems like it's still more work to install a vortech plus you need a intercooler for anything over 10lbs of boost so procharger has just included the part for people who want more after a little taste of boost lol.
all in all cons of vortech are; tapping into the oil pan (you have to drain your oil then drill and tap and then refill your oil) no intercooler, so boost is limited (plus your engine is running hotter because regardless of air flow any to cool the air is better than none) and for a intercooled kit from Vortech you are going to pay the same as a procharger kit.
Cons of procharger are; ? none that i've come to find, the customer service and tech service are great, the base P1sc kit put up against the base vortech kit made more power on a stock block...
I think time wise you'll spend less on a procharger install, you get an intercooled setup, and the option to vent your bypass valve into a blow off valve. It might cost a little less for a Vortech unit but to there is no real room for expansion, I mean anything over 10 lbs and you really need an intercooler and the vortech bypass valve will never even close close to the Procharger race bypass, you need 2 votech bypass valves for 18 lbs of boost :O lol
all in all, to each his own, but i've installed both kits, and i've drove a car with the vortech and a s/c is a s/c but i just like the procharger a lot better and the sound of the kit is a lot better.. just me but if you plan on making any power at all, eventually you'll see the Vortech and get a s/c with intercooler