Looking at your camera gear Jag, you have the same kit lenses that I have. For those, I use Vanguard polarisers ... which were so cheap that I bought one for each lens, even tho' they're the same flter size, so that I don't have to shuffle a polariser back + forth between 2 lenses. The Vanguard polarisers are absolutely fine + do the job
I did go for the Hoya Pro1 Digital polariser for my macro lens + then had to shell out for a 2nd one for my ultra-wide lens (Sigma 10-20mm) because they're different filter sizes. I don't see much of a difference TBH between images using the Vanguard -vs- the expensive Hoya polarisers
However, the fact that the Pro1 Digital are slimline is most definitely a big advantage, especially if you intend to stack filters (use more than one at a time) on any focal length lens, not just ultra-wide angles, and they are also most useful for ultra-wide angle lenses. Even with the slimline filters on my Sigma lens, I still get vignetting at the widest angle when using polariser + UV together.
Price-wise, I got my Hoya's for a very reasonable price from a reputable HK Ebay seller, but you have to be prepared to wait for them, as the shipping can take a couple of weeks or more, but worth the wait if you want to make a saving, especially if you're buying more than one. I'm told that One-Stop Digital is now doing these, so it's worth having a look there, as they are very good price-wise too.