As well as this, I think I may invest in the future an external monitor and dock the macbook pro, so then the pixels won't be a problem as most external displays have a very high pixel count.
That's a good decision, if that's the case, you can go for 13-inch to save yourself some energy on carrying it and making it more portable. If you carry it often, extra portability would be greatly appreciated after a while.
Saying that, if you tend to work with a few windows open (while outside), you might consider the benefit of the extra space and more powerful graphic processor. Also with 15-inch (or 17-inch), you can customise to antiglare version instead of glossy display, and the option of choosing hi-resolution.
For your reference, in current models (Late 2011)
MBA 11-inch: 1366x768 glossy only (135 PPI)
MBA 13-inch: 1440x900 glossy only (128 PPI)
MBP 13-inch: 1280 by 800 glossy only (113 PPI)
MBP 15-inch: 1440 by 900 glossy (stock model) (110 PPI)
, 1680 by 1050 glossy or 1680 by 1050 antiglare (128 PPI)
MBP 17-inch: 1920 by 1200 glossy (stock model) or 1920 by 1200 antiglare (132 PPI)
Glossy vs antiglare is another debate, I would only point out that colour is more saturated in glossy, and glossy screen is easier to read under the sun.
The the issue i found was that I do use Cds (As i love music and film), But do any of you photographer still use them for you work? i ask this as I've heard the new Pro will not include a SuperDrive.
That's what rumour says. One thing very important... don't treat rumours like bible.
If that's the case, you can either use Remote Disc feature or get an Apple MacBook Air SuperDrive
, USB connected. Remote Disc allows you to use the optical drive on nearby Mac or PC as its own.
As for music, all my songs are ripped into iTunes (first thing I do after I bought the CD).
The MacBook Air SuperDrive works for MacBook Air and Mac mini. Most of the time it leaves inside its box since I transfer most files via 802.11n or gigabit ethernet.