Personally I think both Lemon64 and Denial are both excellent.
Admittedly Denial is small and somewhat less traffic than Lemon 64 seems to have, but I think VIC 20s are fairly rare now for a good one in working condition, but rarer are people interested in it. What Denial has is a very good hard core of knowledgeable people that have most aspects covered. The Mega Cart, for instance, is an amazing product, I wish there was a C64 version.
If we're talking about traffic though, I think World of Spectrum seems to be the busiest 8 bit website that I've encountered.
Considering Jeff does DEnial prettty much by himself, I think it is an excellent site, and I seriously hope it continues. Competition is always good, so a LemonVic20 would also be cool. If it ever happened, I think it makes sense to link it with PET and TED machines.
I agree with Jeff. You should really be using a VIC 20.