See my signature.
I installed a GMPP HT383E crate engine in my Suburban for exactly the reasons you're talking about. Yes, I wanted a little more power, but I mostly wanted something that would be bullet-proof reliable.
I have to report that after now having this engine for several years, I am VERY pleased with it and have no problem recommending it. It's pretty much everything I wanted in the swap. There are a few things I wish I'd known ahead of time, the main one being to replace more of the addons and engine accessories at the same time I did the swap. Eg, distributor, PCV, EGR, EVAP etc. but most of all the fuel injection spider. I recommend that upgrade to every Vortec owner, but especially engine swappers.
I can post more and answer questions, but I've already posted a LOT on this project over at GM-Truck Club (no offense to this forum, I've just been a member there a lot longer).