Despite the impression that you could garner from reading threads about the 575 here, it is a good saw with decent power, more torque than a stock 372.
I agree, Husky could have done better with the texture of the handlebar grip and it seems regressive to me that they didn`t considering that they added the rubber to the rear handle, apparently to enhance grip.
If you buy PHO, the choice is entirely up to you. .050 gauge chain is available everywhere from dealers for every brand. As a counterpoint but because of the avaialbility of .050 chain, if you are very patient you can find pretty good deals on eBay for .058 bars and chain because it is less popular.
.050 and .058 gauge chain is made from the same base parts with the drive tangs being forged thinner on the .050. There is no performance difference although there is a theoretical wear advantage to the .058 on the sprocket because it has a .008 greater bearing surface. I think this is irrelevant since the greatest wear to the rim seems to be from the tie straps, which are identical.
Russ