You're welcome Catherine
Hoppy,
How does the wing nut locking for the centre column on your C-257 feel, is it reasonably smooth and does it have a positive lock?
It looks "similar" to the earlier Gitzo 2530.
Centre column lock is just fine. Yes, they are Gitzo clones and until recently Benro even had the same enamel finish as Gitzo and were virtually indistinguishable. But then many other tripods on the market copy the basic Gitzo design in terms of leg mechs and hinges etc. Designing a tripod is not rocket science!
Price is really no guide to quality these days. You can buy a Benro from DC's Store on ebay, or a number of other ebay suppliers, or you can buy the same thing from PhotoPal.co.uk (who are not the official importers, despite what they say) and pay a bit more, or via Kenro (who are the official importers) from your local dealer and pay even more still
http://www.kenro.co.uk/productgroup/14/Benro.html?PHPSESSID=7dubt22vite99gjmm21j4mlj06 However, DC's Store has the biggest range at the lowest prices, and their service is very good. The same Benro tripods are also sold as Induro through Calumet, again at greater cost.
What is driving the price here is the middle men. When you add the cost of an official importer with their overheads, plus a high street retailer with all that entails, you end up with a tripod that costs pretty much the same as most other top brands. If you could buy a Gitzo, at cost from the factory gates, it would be a fraction of the retail price. That's fairly obvious I guess, and no criticism of Gitzo - just how things are.
Benro have made a deliberate attempt to copy both the quality and the design of Gitzo. They do the same with Arca Swiss heads (eg the B-series and J-series, not the cheaper KS-series) and also Wimberley gimbals. I have compared my Benro C-257 side by side with similar Gitzos, Manfrottos and Giottos. It is comparable to Gitzo, and better than the others. Not that there is much at all wrong with them but the Benro and Gitzo are a little more rigid, a little lighter, better engineered and finished. Comparison test of ball heads here
http://www.traumflieger.de/desktop/ballhead/ballheads4.php That's the summary page in German, but you'll get the gist of it, or run a translation through BabelFish.
There are many other really good brands out there too, also Chinese. Giottos are Chinese (not actually designed or made by Leonardo da Vinci

) Slik are Chinese, Manfrotto and Gitzo have some of their stuff made in China though they don't talk about it much. China is taking over the production of this stuff basically.
Other really good brands at very good prices are Feisol (as used by the Army, after extensive comparison testing apparently) and Triopo but you won't see them in the shops.
And let's not forget RedSnapper in all this. They are more Manfrotto than Gitzo quality, but that is no bad thing at all and the prices are very good indeed - plus TPers get an extra 10% off

I have just bought one for a mate and at £99 for a decent sized tripod and a quality ball head, a bargain. Dozens of TPers have RedSnappers, and all seem very happy. They are made in China, in the same factory as Slik, to RS Joe's spec.
PS, If I was buying a new ball head, I'd get this PhotoClam with integral panning clamp
http://www.dentonimages.com/page.php?id=Photo_Clam_Pro_Gold_II_Easy_PQR_Review I'm pretty sure it's a Markins Q3 underneath (Korean) which is top drawer, very strong, really light, and the pan head feature is mint

Stick it on a Benro C-257 or maybe a C-258
