As my missus refers to me as Dave Lister for some unknown reason (I am a guitar glod) I like the actual guitar masking my "ahem" performance :) Having said that, when I'm not being delusional, I like the CDLC that has the Guitar removed so i can hear where I have improved ---- and where I need to improve -------------------------------------------------------------------------------------------------------------- ----- and it's fun to actually hear yourself.
I've been using a Prosound wireless system I bought from Maplin a few years ago. I've never noticed any lag and the sound quality is brilliant. And as an added bonus I no longer trip over my cables. Just checked and it's now down to £59.99. www.maplin.co.uk/p/prosound-wireless-guitar-system-n88gu Hope this helps :)
Damn it I thpught RSI was a new version of Rocksmith :) Seriously though I also have spnial damage (crushed spinal cord in my case) and nerve damage, I find Co-Dydramol are the tablets for me when it comes to taking the edge off the pain and tingling, it doesn't interfere with the other medication I take, have a word with your Dr, and have they checked for Carpal Tunnel Syndrome in your wrist. Good luck with getting it sorted