Here's my experience in a little more detail:
I've used both a Glossy standard res 15" MacBook Pro from the last years model over the last few months, and now I own an Hi Res Anti-Glare 15" MacBook Pro. I first experienced these Hi Res displays on the last generation 17" MacBook Pros I believe. I seem to remember looking at my friends new C2D and thinking, oh really small fonts, I don't like it.
As I wanted a matte type display on my laptop I wanted, I was forced by Apple to either get an old iBook G4, which I actually did buy from eBay, but it was faulty, so back it went, or get a Pro. On my iBook the screen was duller than my iMac G5 (with matte display), and I just wasn't happy with it. My plan was then to buy a MacBook, but the shiny displays on those, even without the glass panel like on the Pro range wasn't what I wanted. There was no other alternatives other than to get a MacBook Pro with Anti-Glare, which in this new range, is more expensive than the last, where the different screen would have only cost half as much. Thanks to Apple almost £1500 spent to get a computer I was happy with.
I am happy with it, very much so. The matte bright screen shows images full of colour and crisp fonts. The downside to the higher resolution with all the extra space (pixels) to work with is the font size in some of the programs. Much is customisable, such as web pages viewed in Safari (where you use the Pinch Open & Close motion on the trackpad to change the text size), or the contact list in Adium (think MSN), and the Dock icons that you can set to any size. It's a fact that some people will find the higher resolution to be no good for them, and that some of the text will be too small. Apple needs to allow the user to set the system fonts higher. Some applications, such as Adobe Dreamweaver CS5 has too small fonts in the menu structure/windows, but things like this will get rectified in time as the trend becomes for higher resolution laptops. So all in all, only some fonts are too small for me for easy viewing.
So do you go with high res, standard res, glossy or anti-glare? All depends on your circumstances. For me I went Hi Res Anti-Glare because I wanted Anti-Glare, not because I wanted Hi Res, but I've grown to accept the change from what I was used to, and I now prefer it anyway. Hi Res or standard Glossy? I don't know. I've not used the Hi Res Glossy ones before, so couldn't tell you. The differences between the Anti-Glare and the Glossy screens, disregarding the resolution options, has been discussed elsewhere, many times, and again it comes down to personal preference and what you want from your laptop. There really is no right or wrong, and asking what one is best isn't the way to go about it. Decide what screen you want depending on what you want to use your laptop for, and if you are not fussed with things like that and just want a new laptop, get the standard resolution (and that'd be in Glossy).
I wanted a matte screen because I wasn't happy with the reflections on the Glossy, which I'd never experienced before when using a computer, and because I knew that I'd find design work easier to do with a matte screen. I went in the shop first to check out the Hi Res Anti-Glare displays to make sure I was buying the right thing, as I was concerned about the font sizes. Almost immediately, I thought that the screen looks way better, silver bezel and all, compared to the standard Glossy I had been using.
The Glossy MacBook Pro that I had been using is my Mums, and her concern when buying her laptop was the font sizes, even on a standard resolution one. She has no problems with her computer, but I know for a fact that both my parents would find it difficult to use my Anti-Glare. My Dad struggles sometimes with the fonts on his iMac, which is of a lower resolution.
So the best advice is to go and try before you buy, as there is no right or wrong MacBook Pros, just the right or wrong personal choices.
