Default [Q] Best option to update to 4.4 with root?

Hello folks,

I have a S4 that I rooted back when it first came out. I'm on 4.2.2, I337UCUAMDL and want to update to hopefully stock 4.4 but with root and the ability to change to a custom rom later on. What's my best course of action?

Is there a stock rom that's basically pre-rooted and without Knox, or should I OTA to 4.4.2 and use Towelroot and Safestrap? I'll preface this a tad by saying that I currently can't seem to load CWM Recovery via ROM Manager. SU keeps force closing and I think regular recovery boots instead. I would assume there's a way to load it manually, like ODIN or something, but I'll cross that bridge when I get to it.

Thanks for your time and sorry if someone has asked this before! I couldn't find anything with some quick searches.

EDIT - I actually got CASUAL to fully process (kept hanging before) and got TWRP installed. So I guess my only question now is what ROM to load?