do others here think this a good time for a new position of BRKB?

In a word, no. Not particularly.

It's probably an OK time for a hold of over 10 years, since any entry price now will seem good compared to the ending price. But the valuation levels right now are noticeably above the usual, so I'd expect a flattish year or two at some point. You'll almost certainly see better times to buy.

One possibility: Sit on cash for now. Sleep well. Buy the next time it's trading under 1.4 times book per share. (use the highest book per share seen to date, as it can dip temporarily in bear markets). My hunch is that this opportunity will happen soon enough that the entry price will be lower than today's price, and you'll be earning interest between now an then.

But be warned: when things are cheap, the investing world looks bad. It's emotionally difficult to be a buyer when things look bad, so make this plan in advance and stick to it.

I love this saying: You'll make most of your money in bear markets. It just doesn't seem like it at the time.

Jim