Mitis,
No I will not be doing a valuation comparison. If you have been following the uranium threads btween EXT and BMN, you will know that, that sort of discussion is a dead-end to a disaster.
As you have correctly pointed out, the high grade coking coal that RIV has, for me, is the key!
But I will have a look at RES. If you are interested in other South African based deposits, have a look at CZA.
Cheers, Skip