Hello Galaxy, Part 2

After my previous post, a few other things have popped up regarding my Galaxy S3:

• [B] Unable to view/find any 5Ghz wireless networks.  I have a Linksys E4200 with  Firmware: DD-WRT v24-sp2 (06/14/11) mega installed.  I have 3 networks broadcast.  1 for BG mixed, 1 for N only (5Ghz) and 1 for guests.  
• [B] Cannot connect via USB to browse files.  Apparently I need to install Samsung Kies.  If you've ever done that in the past ( i have ... ) You'll know that is the worst decision you could ever make -- Kies is HORRIBLE.  I've resulted to ejecting the MicroSD card from the phone, and reading it on my laptop to write files that way....