Welcome!
The telescope you suggest has a focal ratio of f11.8; this is considered slow photographically. However if your interest is photographing planets then it is fine.
I see this telescope can be bought for about $850.00 with EQ3-2 mount (RA/DEC motors extra). For the same amount of money you could buy a 12"/f5 Dobsonian which would provide over 5.5x the brightness in images, better resolution and give you access to countless objects visually that the 127mm would not even begin to show. However a Dob mount is not suitable for astrophotography although there are variations that offer such capability at extra cost.
You can also add an equatorial (Poncet) platform to any standard Dob mount later. See
http://www.equatorialplatforms.com/ This also gives tracking ability for visual observing as well as photography. Another (much more expensive) option is ServoCAT. See
http://www.stellarcat.com/
Under dark skies I would go with the largest optics I could afford and know that I can add either an EQ platform or ServoCAT later or get a second photographic telescope with its own mount such as ED80 refractor on an EQ5 (maybe EQ6) mount. This is a very capable and stable photographic system.
Note with astrophotography it is the mount that is more important and the more stable it is the better.
It really depends on where your interests lay and if you're set on photography then go down that path and perhaps others here can chime in with more suggestions on suitable telescopes for astrophotography. If you like what you see visually then buy the biggest optics you can afford as the images will be brighter for the same magnification. I suggest you try and go to any local astronomy club observing night or star party to see what you may like more.
Whatever you get, enjoy!