Opinions please.

I like the Reynolds 853 road frames made by mountain bike companies.

I took a $100 chance on this frame. $75 + $25 shipping on eBay.

I would like to build it with 105 triple components.
This is purely for a rider - not a flip.
I have wheels, saddle, bars, etc - all components except the crank, bb, brakes/shifters, and derailleurs - and fork/headset of course.
I would watch for a 105 triple mini group, or advertise for one on BF to complete.

Is it worth the effort?
What fork would be best for a longer distance, relaxed bike?
Is the 105 triple a good choice?