Hi Gordon - colour is a real personal thing, so you have to go with what you like best, below is a link to an article with the first drive of a 991.2 4 GTS. Review is a bit bland, but does have some pictures of the car in graphite blue. My last car was guards red and it was very attractive/striking to look at. Based on the pics below, I'd say it was significantly nicer than the graphite blue, but as noted - personal preference.
The red is stunning, but looks best when gleaming, and in British weather gets dirty quickly. While I love washing the car, with red you need to do it very regularly (which in Scotland meant almost after every use!). I also saw a carmine red car in the flesh next to my last gaurds red car, and while mine was nice - the carmine was really special looking. Best thing to do is go on youtube and look up 991's being delivered/test driven in various colours, this will give you a better indication as the configurator is not the best way to chose. Red also attracts a lot of attention, all positive in my experience. People were always stopping me to ask about the car, and had kids waving etc as it is quite a striking look, particularly with the black. Silver is a bit more subtle but all depends on what you want. Red looks best on a sunny day, but when it's grey/grim outside I always felt it didn't fit quite right. Depends on what you'll use it for.
Hope this helps, choosing is part of the fun!
http://www.pistonheads.co...amp;utm_campaign=Enews Bulletin&utm_content=PHDS - ENews Bulletin (02.02.2017)::Main_1_1&utm_source=20170202