I've been getting mine from chaos cards (great service and good prices)
I think I might have to up the price to 2p a sleeve and go for pro fit since they measure in at 64mm wide
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ultra pro Platinum
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http://www.chaoscards.co.uk/accessories-c1/binders-pocket-pages-c6/ultra-pro-9-pocket-a4-sized-pages-for-trading-cards-x-100-pages-p386
14.5p each (Holds 900 cards)
No idea on the width of these pockets (I found 70mm being stated on some sites)
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Ultra pro Black
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http://www.chaoscards.co.uk/accessories-c1/binders-pocket-pages-c6/ultra-pro-copy-ultra-pro-18-black-pocket-a4-sized-pages-for-trading-cards-x-100-pages-p11442
35p each (Holds 1800 cards)
The pockets measure 66mm wide
Looks like this might be on of those times where more expensive doesn't always mean better
Ultra Pro Premium Sleeves are 66.7mm wide
Ultra pro Penny sleeves are 67mm wide
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Monster and ultra pro binder pockets (side loaders) measure at 69mm wide (and are 18 per page)
I've also been reading that Ultra pro changed the size of their deck protectors making them small by 1mm - 1.5mm do you think this might have happened to the black binder pages?
Well either way I've answered my own question (partly)
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ANSWER
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No there are no better 18 card binder pages out there I'm stuck with Ultra pro Black and other plastic binder pages instead of heavy duty material ones (Yes I know they are plastic as well but they are textured so easier to get cards in and out)
They ARE too small in width 66mm instead of 70mm so normal penny sleeves or more expensive sleeves do not fit (66.7 - 67mm width).
I can use Pro Fit so sleeve my cards with the black pages (64mm wide) but they cost 2p a sleeve.
All in all very annoyed at the outcome but hey you cant always get what you want.
So for completed card sets or trading binder I'll be sticking with the 180/360 monster/ultra pro binders since they offer the best pages with loads of room for up to 5 cards per pocket and the pages aren't made of plastic
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EDIT
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Ultra pro Fit sleeves are a waste of money they DO NOT fit standard size cards (well they do but they'll cause the card to bend!!!!) avoid these at all costs.
So for a cost affective solution stick with platinum pages and penny sleeves. The expensive solution Black pages with transparent deck protectors (66mm wide)