The Windsor & Newton Series 7 were discussed earlier in this thread, and have also been the subject of many threads in paintbrushes. The Series 7 are, indeed, somewhat shorter than normal, but that hardly detracts from how useful and resilient they are. They need proper care, though - either with a shampoo/conditioner combo or a solid brush soap like Masters.
Lots of professional painters swear by the Series 7, including Jennifer Haley - she once referred to them as brushes that she would make regular blood sacrifices to. The problem is that W&N do churn out naff batches of brushes. W&N also have some serious competitors - I'd say the closest competitor is the Raphael 8404, which has a larger reservoir.
I've used both, but I like the Series 7 more. The size 1 and 2 are actually fine enough to do detail work.
But, you have to pick the one that suits you.