I think the Reti is one of White's most solid options. I have played it a lot myself. After say 1.d4 you sometimes have to deal with some prepared offbeat line of your opponent. By playing 1.Nf3 first you effectively prevent this from happening. It is a kind of waiting-move , asking your opponent to make up his mind. Whatever he comes up with , the Knight on f3 will always be good.
You can either play a real Reti (double fianchetto) or transpose to one or another theoretical line later.
i am playing in a club tournament and i was wondering if the reti could be a solid enough opening