i have done all of them to all of my boxes...
i've done 29 wire, current LPC mod chip (Smartxx V2 currently) my 1.6 gaming box is softmodded cause that works just fine for what i do with it. (Only games on the hard drive, which was upgraded with the help of my mod chip, flashed the 1.6 eeprom to my 1.4 locked 120gb hard drive to eeprom. then use chip to restore original eeprom.) then i;ve had tsop'd boxes too... its all been done under my sun. i have to say. if you know what you are doing, the softmod is very easy, but at the same time, very easy to fuck up. i'd still recommend a chip, and a tsop as the best mods.
heh.. i did get my 1.6 for free.. and the 120gb HD too.. so i'm rocking that xbox modded for free.