I don't know anything about SXG.
For Carpathian... Cormark and Haywood now have detailed reports out on CPN (I just got the Haywood one and am reading the 61page PDF). They both have $1 price based on $1000 gold and $2.75 copper. Based on today's prices the valuation is much higher. I won't say much more on this board but it has been a big winner for me so far and I am holding long-term.