I'm way late to this thread, but here I go anyway. I had an AGW Titan. I ordered it with the option of the slide locking back on the last round(they don't charge for that.) My Titan was really really nice. My ONLY complaint was that the thumb safety was too stiff. The fit and finish was awesome and it did feel like it was on ball bearings. Not sure how it shot. I sold it before I could shoot it, not a knock on the gun - I just wanted the funds for something else and I already owned a SV Infinity. Not sure of the wait time on an AGW, but the wait on an Infinity is 6-8 months. I'm waiting on mine that I ordered in late December. I should have it in a about a little over a month. If you want a full custom and the ability to choose every single detail of the build, get an Infinity. If AGW has a model you fancy and the wait isn't too long, go for AGW. AGWs are nice.
Cost? Build out your Infinity. Get a quote. Put 1K deposit down. Over the next 6 or so months put away money for the difference or simply pay SV as you feel like it, and whatever is left to pay after it's done you pay then.
Good luck