I've spent the last couple of days searching on the internet for the perfect tripod for the RB67. I finally decided on a new Induro AP2 from KEH for $120. Then they tell me the shipping would be $80, and I might (or might not, depending on luck) have to pay customs duty and taxes. My second choice was the Slik 700 for about $20 more, but I liked the quick-release on the Induro better. Thinking I would be screwed on shipping on that as well, I started looking in Canada, knowing the price would be higher and the shipping less. Vistek has the AP2 for $300, but the AKB2 (the ballhead version) for $220. These tripods are both the same price at B&H, $181 - don't know why KEH was so much cheaper. I've almost decided to go with the ballhead. The tripod and ballhead are rated for 18.7 lbs, so in theory at least should be ok for my 6 lb RB67. The tripod weighs 4.2 lbs, a lot better than my 12 lb Manfrotto.
I will start niggling at my accountant to spring for some $ for the Induro AKB2 unless one or more of you tell me I'm crazy - for considering this tripod, or for getting a ballhead. This is the tripod, if anyone cares to look.
http://www.vistek.ca/marketing/procentre/induro/tripodkits.aspx
Thanks for the advice and general talk about suitable tripods. APUG is indeed a great resource and well worth the subscription fee!