Best storage method for reader box

[Mike Zanker]

I'm looking for the best compromise between news reader speed and 
expire times.

My own experience so far is that tradindexed offers good performance 
for readers (fast XOVER and NEWNEWS) but can take ages to expire.

Timecaf gives a relatively quick expire but XOVER is horrendous on a 
group with a few thousand unread articles.

How are timehash and CNFS in this respect?

Thanks,

Mike.