An introductory Morgan Cattle Company deck with 2x Base Set. The four decks in this series can all be built at the same time, excluding the jokers (you'll have 4x jokers from two Base Sets, so you can switch them in to whichever two decks you're playing with).
Your main shooting values are 7, 8 and 9.
Your plan is to spend the early game inventing gadgets to make some competent shooters and build out the town using your home's ability.
An alternative, less interactive "land slide" deck can be built out of the Morgan Cattle Company. This focuses on using the Morgan home to play lots of deeds and running away from combat. I'll see about providing a deck list if there's interest.
Expanding your collection
Faith & Fear (PB): Chuan "Jen" Qí is a Mad Scientist stud who gets bonuses when she has a horse/gadget – she makes putting together starting posses much easier and has good synergies with both horses and gadgets. This set also contains Lane Healey (Exp.1), who is a dude with a way to force callouts at deeds and Bio-Charged Neutralizer, a fun gadget that boosts bullets and turns your pathetic draw mad scientists in to mighty stud shooters. William Specks is another Mad Scientist with influence and he can help you quickly get more deeds/gadgets in to play cheaply.
Bad Medicine (SB): Yagn's Mechanical Skeleton is both a horse and a gadget, so it has strong synergy with lots of your dudes (including Chuan “Jen” Qi above and many of the base set dudes). Arnold Stewart gives you a cheap 1 influence Mad Scientist who can add diversity to your starting posse options.
Blood Moon Rising (PB): This will give you Diego Linares, a cheap Mad Scientist with influence – he gets a bonus to inventing Horse gadgets like Yagn’s Mechanical Skeleton so you can include a broader range of cards and still successfully invent gadgets. This also provides Post-A-Tron (a 2-stud gadget dude you can try to invent at the start of the game and who can boot in Town Square to make Ghost Rock) and Hydro-Puncher (a useful gadget weapon that combos well with Yagn’s Mechanical Skeleton).
Dirty Deeds (SB): This gives you A Slight Modification, which lets you boot a gadget to cancel certain shootout abilities and non-Cheatin’ Resolution abilities. This is the only “Counterspell” style effect in the game!
A fuller guide to getting started in Doomtown reloaded is available here: http://forums.pineboxentertainment.com/t/a-buyers-guide-to-doomtown-reloaded-introductory-decks-for-2x-base-set/1632