I don’t have a thickwall cylinder but Walter (on here) has one and also says that it is of great quality. If I ever eventually need a larger cylinder I will probably go for one of these too, they look like that are of brilliant quality. Expensive, but seeing the amount of time and use you get out of a cylinder, they are worth it. As stated above, you can do it if you combine a break-bleeder pump and the cylinder, for quite cheap.
There is another good and cheap combination that I have been using for the past year called leluv Maxi. I would definitely recommend this set-up to others too, you can get it on ebay.co.uk too:
I have used other set-ups like size matters and found them to be awful. If you are buying a pump set, I would avoid plastic pump handles as they are very fragile and have broken a few myself back when I was starting out.