I'll prob just buy a premod console. I see terms like, zephyr, falcon, ace v3, rgh, rgh2. What should I look for? Again all I want is to install and run xbla. Thanks
Zephyr and Falcon refer to the motherboard type.
https://www.weekendmodder.com/identify.html
The older stuff might warrant different mods or have different responses.
Similarly I would myself not get anything older than a Jasper motherboard for the original family -- older boards are more prone to the RRoD (red ring of death) failure mode.
RGH.
There are two main families of 360 hardware mod to give you total control, though technically might be four plus people buying old dev kits.
King Kong is the original mod that allowed software control. Nobody will be doing that today and anything will have been converted to JTAG.
JTAG is then the first main category, sometimes called SMC hack among those doing the really low level hacks but everybody will know JTAG. It is a simpler to do mod (it involves soldering a few basic components to the board) but was blocked by an update many many years ago and did not make its way to full mod for a while after that so plenty had already updated.
No option for dual nand here but you do have total control.
RGH is what came later. Short for reset glitch hack, it exploits a flaw in the hardware but does not always work so may take a while to boot (why some will mention boot times, glitch times and the like) so has to reset until it does (said reset is also part of the process anyway). Can have dual nand (most would maintain a clean and a hacked version to allow online play) but not all will do this mod (lot of effort, not much gain).
RGH2 is a minor tweak on RGH that works around some of the blocks and is more useful in some types of motherboard.
ACEV3 is a type of mod chip that is installed. Quite a nice one and possibly an improvement over basic RGH chips which is probably why it is mentioned.
If you carry on searching around then you will possibly see profile sharing (people used to buy up lots of games on profiles, put it all online, have people download profiles and associated games and then could play games on those, MS stopped it years ago), live2CON (the main format for the 360 is called STFS, it has three main sub formats with Live being XBLA, DLC and the like and CON being saves, sometimes it was possible to force things in Live format that needs to be signed by MS into CON that can be signed by your own console and play things accordingly) and maybe mention of a handful of bypass techniques (a handful of games have had versions where you could bypass the end of demo block -- each XBLA demo is in fact the full game). All are basically dead, save maybe one of the bypass techniques.