Apple does some things really well. Im a professional computer user and stayed away from them after trying them over a decade ago. They are a lot better now.
Somethings to consider though. The price you pay for a mac, you get a better pc than the mac is. It will be faster, the battery will last longer, and there will be more memory.
The photo browsing software on Macs is currently superior. BUT, just the browsing software. Too many amazing apps aren't available on macs currently. This is always the case, they are always second for apps.
Now, please mac users dont kill me. I have a dual booting pc, it runs leopard and Windows 7. 7 is already more stable than Vista was at launch btw. I love somethings about mac, there are just way too many downsides.
Here's what you want for a laptop, assuming you don't get a mac, and you really shouldnt. Macs are great if you want portability (weight) at a premium, and are willing to sacrifice power and versatility to do it. There's just no argument there. For a very limited number of people (graphic design, and this does not mean photos) macs MIGHT be better. Even then many graphic designers use pcs because of the tech lag macs have. Mac has the best ad campaign in the industry. Otherwise their market share would be even lower than the pathetic share it has in home pcs (fiver percentish). One day mac will open up their restrictions even more and be a truly amazing product. Compared to 10 years ago they already loosened so many restrictions (more open with code, getting intel processors etc). Currently a 800 dollar pc will be more powerful than the cheapest 1199 macbook.
1. Processor TYPE then speed. This is very important. You just don't want a pentium over an AMD (currently just not cutting it) you want a certain model of pentium, you need to decide EXACTLY how much you want to spend, not kid yourself, before you can get advice on this.
2. Processor Speed. You do not want a quad core, you want a duo for your uses by the way. This means you will get a faster processor and you wont cap it doing what you're doing anyways.
3. You want to fit in this budget a graphics card if at all possible. This could actually be the number one most important thing, but it's a tough call. This is confusing to many people as all computers have one, but 90% of laptops sold have integrated ones. You want a STAND ALONE card. You have to find someone who knows their stuff to read the specs and tell you. Most
best buy employees etc have no clue. This will improve the performance of your computer by easily 30 - 50 percent by the way.
4. HD size. Hard to up on a laptop
5. Ram, easy to upgrade.
6. User reviews. Most users are largely ignorant and have no idea how to rate a computer. Their one opinion based on basically nothing is pretty useless. Technical specs and parts used to make the computer are far more important.
Good luck. It's really not that tough to find the best deal once you know your price. This is the main issue for almost everyone. How much do you want to spend? Really how much, not maybe 1000 or 800, how much, before tax, will you pay? If you say that it's really easy for someone to hit you with a few links and say buy that, or for 100 more buy that and get x, or for 100 less buy that and get y. You get what you pay for with pcs if you have someone who knows their stuff looking for you. You can also pay 1000 for a pile of memory and processor speed but an old processor and no graphics card that runs the same as a 750 dollar one.
Good luck!
Oh, as for your screen. This is really immaterial. CRT are better for photograhy still, but its not an issue for most. If you want a CRT you can get one and plug it in, they are cheap. They also work in multiple res's where as lcds are trash outside of their native reso.