As far as I'm concerned all Pro type solid bars (non Chinese of course!) are good value. The highest quality bars I've ever seen are the Carlton/Tsumura bars made in Japan. Their nose sprocket bearings are like silk. Aussie made GB Pro Tops are also excellent bars - their nose sprockets always seem like they've had a handful of sand thrown in them but I've never had one fail. Also make sure that any of the GB bars you buy from now on are the older Australian made stock apart from harvester bars (also don't assume that GB chain is rebadged Carlton - its not anymore) - All I'll ask is which country has started making all sorts of stuff for cheap prices with less than average quality? I'll leave it at that
The only nose sprocket I've ever had fail was on a Oregon Power Match Plus bar but that wasn't the bar's fault.
Pro type bars that I've used and never had any problems with are;
GB (Aussie Made)
Carlton/Tsumura (Jap Made)
Carlton (German Made)
Oregon (Canadian Made)
There are also a number of bars also made by GB/Oregon that are rebadged as Stihl, Husky, etc etc. I've used Husky bars made by both GB (20") and Oregon (42").
I've never used any of the non GB made Stihl bars but am sure they're as good as anything on the market.
All good quality chain is worthwhile but I personally use Carlton or Windsor. Both excellent brands and good value. I'll cop some flak from the Stihl brigade (once again
) but I've never had any real success with Stihl chain. I recently bought some 3/8" RSC when in Tasmania cutting trees and honestly didn't like it. Out of the box I found the Windsor full chisel loops I had flogged it for speed and lasted longer too. I felt as thought the RSC had to be "forced" to cut until I reground it at 10° (file guide angle - Stihl recommend 0°) and lowered the depth guages a tad. However it certainly is the smoothest chain I've ever cut with if you don't like vibration.
I have also used the Oregon LGX in green wood and found its a good chain as far as full chisel goes too. Unfortunately I cut too much dirty hardwood to use full chisel as a rule so mainly use semi chisel.
I must add though that despite my criticism of Stihl RSC too many people on this site swear by it for it to be a bad chain. I've just found that all the Stihl chain I've used doesn't wear anywhere near as well as Carlton or Windsor which I've also had a fair bit more experience with.
Sorry about the long post - got a tad carried away