You don't actually ask any questions though.
Maybe these would be the answers..
1) Wiikey and Softmod can co-exist without issues - They do for me
2) Updating to 4.1 is possible using Firmware Updater 4.1 (load through HBC( requires internet connected Wii)) Tutorial here http://www.wiihacks.com/recommended-...l-working.html
3) USB Loaders just require a compatible device USB Devices Compatibility List - WikiTemp a cIOS and a USB Loader application which you run through HBC or a channel. Really quite simple and lots of tutorials on Wiihacks.