lsvtecs can be reliable when built and tuned correctly. a boosted lsvtec just needs some extra TLC.

if you want an experienced shop to build you one it's going to be costly. just to give you an idea check out these shops...

www.laskeyracing.com
www.importbuilders.com
www.goldeneagle.com
www.exospeed.com

that should be plenty to get you started for now.