I used to have diamond cut alloys on my E46 M3, they look great but if you Kerb them then you can only have them recut twice, then you start affecting the integrity of the wheel, which means the wheel is thrown away. :-(
The other thing is you'll need to frequently apply sealant/polish as there is no lacquer. I used Poorboys which is excellent and keeps brake dust, salt and general road crap from discolouring the alloy face.
Now, if your car is for high days and holidays the I'd say diamond cut alloys would be fine, for a daily driver I think they take too much looking after and are too costly if they get kerbed.
Granted the M3's alloys were 19" so they were £100+ each to cut. what do you pay for 14" out of onterest??
I've seen some diamond cut alloys left with circular machining marks, so I'd check the quality first, but it sounds like your committed already.
Not trying to put you off, just sharing my experiences.