Well, Welder + Cloudpost has been done before.

http://sales.starcitygames.com//deck...p?DeckID=87312
http://sales.starcitygames.com//deck...p?DeckID=73263

I am not sure I like the idea of losing the Sol Lands though, Ancient Tomb in particular. I'd much rather do something like:
4 Mountain
4 Great Furnace
4 Glimmerpost
4 Cloudpost
4 Ancient Tomb
2 Vesuva
2 City of Traitors

City of Traitors is the weakest link in our land base, but is a necessary evil sometimes. I really want an Eldrazi Temple for artifacts, or a mini-Mishra's Workshop. Release is on a Commander set so it won't affect Modern. It would not impact Vintage much anyways since Shops are just going to swap Ancient Tomb for them.

I'd say the biggest draws to splashing red are:
1. Daretti
2. Blood Moon
3. Goblin Welder
4. Goblin Sharpshooter
5. Whipflare