Masters of Mobile Computing, appreciate your help

1. Preferred Brand: no Acer
2. Budget: Less than 3.8K including RAM upgrade if required
3. Usage: Photoshop, Illustrator, Xilisoft video converter, heavy powerpoint/excel user with heavy formatting
4. Preferred laptop/screen size
- Screensize: 15 inch
- Processor: i7
- SSD
- backlit keyboard would be nice

Perhaps, N550JV OR Y510P OR Shall I wait?

Currently laptop Asus N53. Working fine, just need to reformat. It gets slower after every Windows update till its unbearable...

Thank you so much for your reply.

Already 8G, some files still took a long time to open. Not sure if 12G helps, but now is a bad time to buy RAM. So ex..