I was in the same predicment as well, and just got a new 17incher and LOVE it 🙂 . Really icouldn't be happier. I went to the aple store to try and get it all figured out, but was having a very hard time. In the end I went with the 17er because the digital out is a godsend to a musician, as well as having more screen realestate. I didn't know how much love I'd have for being able to see more, until I got the computer home and was able to just do my normal routine. It just feels so much nicer on this 17er after having a 15inch flat apple lcd for so long. AS for carrying it around, well i'll be taking it to school and work, and I don't think 17inches is too large, especially if you find the right bag to travel with. I think if you could get your hands on a friends, even an older model, so you could try it out for a day with your usual activities, you'd have a much better idea of waht you want, cause then you could try lugging thte "beast" around. One last side note, true some say that the proportions look a little funny on the bigger screen, but when i look at it, all I see is beauty. I think you're making a wonderful choice in an aplloe laptop, and its great that your biggest problem right now with them is 15 inches vs 17. If you have any more questions freel free to ask.