There shouldn't be any benefit to pool hopping with CPPSRB, so I'd stick to Eligius.
Not entirely true. I had a miner outage I didn't care to repair (because the cost driving to the mining site are in no relation to the mining gain), so I went to the site after a month because I had other business there and repaired the miner.
Since then, the miner has reached a saturation in the "Estimated Change" value, so In fact I had a month of absence in the pool without this having any negative consequences to my reward for this round.
Assumed there will be a reward for this round ever again...
Rico