I'm in the same position and I've been doing some homework....
- get as much memory as you can. As I remember, 16 GB is the upper limit for Mac laptops, so get that. More if you can.
- the kid in the Apple store recommended getting a 15-inch MacBook Pro with the dedicated graphics card. The graphics card has an additional 2 GB of very fast RAM that will speed up graphics programs like Photoshop and Lightroom. In addition, some graphics programs like Lightroom are now off loading some processing to that fast graphics card to improve performance. I haven't checked to see if the card in the MacBook Pro is one of the supported graphics cards, but I'll bet it is. You can find a list of supported cards on the Adobe website to make sure. Either way, that card will help with Adobe products.
- you may want to wait awhile. There is a new Intel processor called "Skylake" that should be in Mac laptops later this fall or early next year (I hope) that will improve graphics performance by about 30% and overall performance by about 20%. It will also improve battery life. One pundit suggested that Apple will stop selling MacBooks with a dedicated graphics card altogether because it won't be necessary with Skylake. We shall see. By the way, Skylake is the hot new chip from Intel that we hope to see soon. The last chip was "Broadwell" and it's in the 13-inch MBP now while the chip before that was "Haswell" and it's in the current 15-inch MBP. I would be reluctant to buy a 15-inch MacBook Pro now with a processor that's two generations old. That's just me.
- you may want to wait awhile, part 2. There is a new standard for data transfer from the SSD just hitting the streets called "NVMe" and it's much faster than the PCIe standard in current MacBook Pros. It's in the new MacBook and I hope it reaches the MBP with Skylake. THAT would be a screamin' machine.
Hope that helps.
Cheers,
Dave
