newbie modchip questions..

[twikoff]

thinking about picking up an xbox, but want to get a little more info on the mods

Ive gone the soldering route before (with my old psx), and Im definitly not very good at that

so Ill probably look into the matrix
I have no problems at all with the idea of needing to flash the bios.. so thats not an issue..

what are the advantages/disadvantages of the different mods, compared to each other

and are there any that will let you play online? or will I have to get a solderless one, just so I can remove it and put the original disk in, everytime I want to get online and play with friends?