Welcome aboard. My advice is to watch the sales threads here. Lots of people built some really nice Tudors, they were really hot items a few years back and I haven't seen many of them come up for sale since then.
How bad is your itch? It might be an expensive scratch. Fr example my build uses a Phong case set ($800), gen 702 crown and tube ($350) gen Superdome Tropic 39 crystal ($300), gen dial and hands ($450) gen MkIII slate grey insert ($1,000) , gen ETA 7846 movement ($250) and Mary's 7836 band ($50). Total not including labor, fitting, finishing and shipping was about $3200 and that's for a "good" build, not "insanely good". Behold the Frosty Flake.